I was able to purchase a self adhesive kit for an older Leica slr from their US service center for a low price, forget the cost now, but I think on the order of $11 or so. I also have used adhesive felt and thin foam sheeting from a local craft store, and acrylic yarn (long filament stuff that doesn't shed) with a tiny bit of contact cement. I like the yarn idea because it doesn't go bad like standard OEM replacement foam might. I haven't used the interslice stuff, but I believe his foam is a higher grade that doesn't decompose like a lot of the original stuff does.

Lee