I recently contacted Jerry Glow (he's posted a number of times on the ACL-SAL-SCL Yahoo forum) to have some Seaboard Air Line decals made for a project I'm working on. He does mostly HO and N, but will do O scale for an additional fee.
Jerry came thru fine, the decals appear to be as good a quality as any I have seen (Walthers, Microscale, Champ, etc). I got enough for 2 cars and a delivered cost of $31. Here's a link to what they look like:
http://home.comcast.net/%7Ejerryglow/decals.html
(click on "Full List") , then click on "(new) Seaboard Double Door".
I have not put them on the car yet, but if the temperature cooperates I should have them on within a week.
Now that he has them designed and listed, the price may be lower, not sure (I need to contact him to find out).
Just thought I would pass this out to everyone. O scale decal resources seem to be dying out so supporting these guys is crucial.