Making my own LED lights (w/China source)

Town and Country sells replacement Lionel LED bulbs for 50 bulbs for $60.  You just plug them them in.   The bulbs run on AC or DC.  You might get the quantity discount on a mixed lot if you ask.

I second @shorling mentioning Town and Country. Much easier and just about as cost effective as rolling your own.

As for the TVS diodes, they belong on all layouts, but not at each individual bulb.

If you are doing this to try and learn electronics, it's a good way to get started. Electronics can also be a very fun and rewarding hobby. It's also good to learn something about electronics for doing your own projects on your trains or layout. However, if you only want to change to LEDs and don't want to learn more about electronics, the bulbs as suggested above would be a much easier and faster option.

I'll go with the wanting to learn more about electronics choice here. If you are just starting out wanting to learn more about electronics, you might want to find a 'Through Hole' bridge rectifier. The one you linked to is surface mount and can be more difficult to solder unless you are experienced with this type of component. The 'Through Hole' components are much easier to start with. All of your other selections are 'Through Hole' components.

For the TVS Diodes you will want the bi-directional versions (part numbers ending in CA). The most often used here is the 1.5KE36CA. Recently, one of our very knowledgeable electronics folks here (gunrunnerjohn) has been using the 1.5KE39CA which allows a slightly higher voltage to pass (33.3 volts (1.5KE39CA) as opposed to 30.8 volts (1.5KE36CA)).  

I might also suggest ordering some resistors in different values so you can experiment with different brightness levels. You may or may not be satisfied with the light provided from your LEDs with the only two resistor values being selected. (Of course, unless you have already tried these and are satisfied with them.)   

FWIW, I have ordered from LCSC before with good results both with ordering and with their component quality. It just takes a while to get the parts as do most orders from the Asian suppliers. 

As an alternate supplier, Digikey (USA) is a good one (much faster). Lately, I've been getting almost all of my components from them. Their per component prices are a bit higher. As with LCSC, ordering in quantities can sometimes bring the prices down quite a bit.

Steve/BMORAN4/RTR12 -

Thanks for pointing me to Town & Country. When I get boxes unpacked I'll get a proper count on each bulb-type and then contact them about a mixed bulk purchase (I see I have them bookmarked already in this browser from prior posts).
I forgot to mention that I've been soldering since I was about 10. Around 12-13 I built a Heathkit (remember them? <chuckle>. Wow, they seem to still exist!) shortwave receiver with my Dad. That was really cool to build. I listened to "the world" for many years on that Remember those "Number stations"? Spy news...
Thanks folks

Well experience with soldering helps a lot, but the surface mount components can still be a bit challenging. I do remember the Heathkit stuff, but didn't know they were still around? I'll have to have a look see. Heathkit had some nice stuff back in the day, they even opened a brand new store here back in the late '70s, unfortunately it is long gone.

Heathkit.......brings back memories.  I still have all that stuff:  VTVM, Scope, RF Generator, RC Bridge, tube tester, manuals.  Built it all 50+ years ago.  Some of it still works.  I suspect switch/tube contacts/eyelets are corroded and electrolytic caps are dried up.