These Kemets look identical to the AVXs, and only cost $.47 each.

http://www.mouser.com/ProductDetail/Kemet/T491D476K016AT/?qs=sGAEpiMZZMtZ1n0r9vR22SjDo%2fRaJSx%252b4jYqLAhRWTo%3d

They have a higher ESR than the AVXs, but both have lower ESRs than the Cornell-Dubilier electrolytics. Might be worth a shot.