Whither cheap power transformers these days?

I'm looking for about ~55VAC, >=10A to run some big old steppers with
geckos. Of course, I could also divide and conquer with a bunch of 4A
transformers. I would just really like to get close to 80 volts max DC input
to the geckos, and I'm not having much luck locating any iron with the right
voltage and current ratings. Are there any Internet electronic surplus sites
out there with good deals currently? Pointers would be appreciated.

Regards,

Paul R. Hvidston, N6MGN
ACKSYS Engineering
Upland, CA