I understand the whole part into actually researching (which has been done years ago by actual manufacturers) and putting time into finding someone to copy the teflon seals and the orings... But let be real about this... With increase in demend the cost should drop allong with the cost of multi manufacturing. Most likely it cost less then a couple of dollars to make up the kit.
Like many people have tried before.. As long as i have the measurements i can get these seals locally much cheaper. The problem is willing to release this secret so people just get the kit and forget about about it. If anyone is willing to lend me their old seals id be willing to get some kits for the Canadians