Those eBay Interslice kits are EXCELLENT! I've purchase 3 of those from Mr. Goodman, and he's a great guy to work with. Shipping is very quick, and supplies are top quality. Don't hesitate to do your own seal replacement if you are patient and careful. If you're a sloppy worker though, have someone else do it for you... So far I've done foam on about 8 old Nikons. No problems, but you do need to concentrate (screaming kids and a wife needing attention doesn't help).