I have a homebrew 260 grain hill style , will try to mail it to you or send it out with a friend who is travelling.
Regards to the testing media I have been thinking about a good media for archery. Foam behave differently to animal tissue. I use a burlap target that is mostly shredded after a few days but is tough to stab in with a shaving sharp esee 4. I was thinking that regardless of all gel test and cardboard is likely to be a best of worlds. Plywood is not likely to test the edge too harshly (which may be your intent or not). May be cheaper thinner ceramic plate or cow scapula.
I have been also thinking of doing a penetration test to show my take on a heavy bow and light bow sort of scenario. Let me know what media you go with - will try to mimic as closely as possible given our different locations