Japan has always kept the best for themselves. We never got any of the limited run models in the UK. Same for the Impreza. No RA, Spec C etc. If you wanted one, you had to import it yourself.
Ps, I applaud what you've done so far with yours. Looks stunning. The dealer I've just bought my TBSTI from had 2 x S402 wagons in stock for sale. However, they were triple the price of mine and then once VAT, import duty, shipping etc was added, they worked out too expensive to get on the road.
This is one of them -
https://www.fujicars.jp/detail/19102255/index.html