Yonaka seat bracket for s13

Like the title says, I need to buy ONE (1) seat bracket for the s13 model. I tried to fabricate it but it’s too complicated. If nobody has it, can anyone let me know which brackets I can buy that would fit the yonaka seat?
The holes are 11 inches along the rails and 15 3/4 inches across

sparco brackets work but these seats in s13 are way to high i am 6’0 and my head was ou the sun roof with yonaka samurai seats you feel like a truck driver