Hi try this place

http://www.bestfriends.org/aboutus/s...ents/index.cfm

I understand you don't have a car but if you had someone willing to drive you to the vets to drop off and pick up the feral cats maybe best friends would be willing to help fund to get these cats fixed.

It's worth a shot, I know when I was dealing with a colony of cats I got a lot of help from them.

Melissa