The resin you buy at lowes or other stores is not hard enough to make a stamp with. I bought Casting resin online from that's also where I bought my molding supplies. It's not cheap, but I use it maily for casting resin bird skull necklaces for my etsy shop so for me it's cost effective. You can mount the stamps on woodblocks (Michaels has good ones) using the resin from lowes, it will bond the two. Super glue or wood glue wont really hold well.
There are places that will make you custom soap stamps with your logo on them out of metal that will last you a lifetime, so that's worth looking into.
I will get some pictures up soon
