Highly recommend checking out
https://rise-yokohama.jp/
Honestly not sure how it works to deal with him in English, main downside. But he specializes partly in Swift Sports these days. He is a senior from the old Mid Night racing club in Japan.
Pretty sure he has his own that he takes to tsukuba and then he works on multiple customer cars. In case something of his interests you.
It always looks like it'd be a fun little car. Too bad we don't get them here.