In article , says...

Assuming you know the part# or (voltage, mfd, style) you might try:

www.digikey.com

www.jameco.com

www.rpelectronics.com

http://www.allelectronics.com/

http://www.bgmicro.com/shop.asp

Capacitors for power applications like this often have one or two important specs
that are not printed on the case. (for example: equivalent series resistance)

I don't want to be alarmist, but a substitute part even with identical voltage and
capacitance ratings could fail catastrophically. If the original component shows a
manufacturer and model number in addition to the capacitance and voltage, then the
OP could seek an identical replacement from one of these distributors. If not,
then the safe route would be to pay the $27 to get a part from Hamilton.