Just so happens that I make gaskets! I can make any "fiber" or paper type gasket you need. If I can get a few people interested, I can start making a few!
I am currently working with quite a few vintage kart guys with good results. I have the West Bend 580/700, 610/820, McCulloch MC49, MC91, and most carb gaskets in stock. I use OEM gaskets as patterns and digitize them. Once fitment is correct, I can CNC cut as many as needed!