Anyone got an idea what the font is the EBT used for the hoppers in the later years?
(Blatant advertisement) You looking specifically for EBT hopper lettering? The Friends of the EBT Company Store sells dry transfer sets–two cars per set–for $22. You can choose from three eras - 1910s - 20s; 30s; 40s+. Accurate for 1:20.3
As for the fonts themselves used in later years, they used a mixture. A sans-serif font similar to Arial or Helvetica, and a serif stencil font. The numbers were typically the sans serif, while the lettering (capacity, weight, etc.) were the serif. The sans serif first came into use in the 30s, and survived on the flat cars up to the end of common-carrier operations. The sans serif font is also a stencil, so you’ll see breaks in the letters upon close examination.
Alas, there is no single font that is a match for either lettering. When I did the artwork for the FEBT sets, I started with fonts that were close, and modified them in Illustrator to match photos. (And to no surprise, there are many subtle variations there, too.)
Later,
K
Kevin,
Do you have a link to the “Friends of the EBT” Company store?
I don’t know if Dick’s got the lettering listed on line yet–they’re actually still sitting in my workshop waiting to be packaged up into sets. If you’ve got the latest Timber Transfer, check the Mixed Freight column. If you don’t, why not??? 
Okay, okay…
(http://1stclass.mylargescale.com/eastbroadtop/EBTPrototype/EBTTransfers.jpg)
BTW, FEBT members get a 15% discount. Later, K
Thank you Kevin and Jon. I’ve not found them listed at the site.