I'm getting it from Japan. And will review it as soon as I get it, early december all being well.
I always try to support UK importers and you'll not see mention of where the review car was obtained if I bought it. So the 501x will come from the same place the ZX5 and Tamiya Mini Frog came from, both obtained long before the UK importers had them and after trying, and failing, to get some help to review these cars.
(its the only way I can review the cars as an individual)