Go on eBay and order some 1/32 paper gasket material, very inexpensive.
take a picture of the gasket with a ruler on each side for reference.
find someone with a cricut machine, cuts vinyl for t-shirts and stuff and have them convert your file from its format to sac and feed the gasket paper into the machine and cut you a couple out.
cannot believe people who work with this stuff all the time and sell parts do not make these up for sale. $.10 each could easily get you $8-$10 a set. WTF?