"Microscale seems to be willing to sell O Scale decals again. Go direct."
Well, yes and no.
I get their newsletter and yes, they have re-introduced a few sets again in O-scale. BUT, if they fail to sell, I can promise that won't happen again. I talked to the owner of Microscale years ago, and his reason for dropping O-scale decals was simple: THEY DON'T SELL... regardless of what people think here.
I questioned him about this, saying I couldn't believe that Class A railroads weren't selling in O-scale decals. And he explained he couldn't afford to keep an original run in stock for 5 years... that he loses money on that.
So if you now see something you think you might like, or might be able to adapt, my advice is to send Microscale a message by purchasing the decals... that's the only was to insure they keep getting made.