I've had good luck with the Panasonic TS series from Digi-key. I have used them on two different projects and I have been very happy with them. Here is a link. I usually get the ones with the lowest ESR.
http://search.digikey.com/scripts/DkSearch/dksus.dll?Cat=131081&k=panasonic%20TS
Mechans they stop production a couple of years ago I believe. Not a big enough market.
Good luck