...That Vulcan looks like a Mini Inferno clone...I have a pretty beat up AON ELECTRIC 5800L that would work...3.2 shaft and I probably have pinions to fit...I am all out of AON 4900's though...The motor i made a household name for the Mini Inferno :D Though i dont expect any of you 'big' scale guys would be aware of that :D

...Mike let me know if you are interested in it and i can mail you the details...