Go to digi key. They have Panasonic brand at 500 Volt in 125 uf and 100uf. They are physical smaller so you will have to make a foam spacer around them to fit in the clamp, but work perfectly electrically .. under 5 dollars. use them all the time on older tube rigs http://www.digikey.com/scripts/dksearch/dksus.dll?Filter 73 john