import of a European brand car e.g. VW Tiguan from Japan vs UK - anyone got experience?

family member asking me to source a car as I'd brought one in for her from UK back in '17 and it worked out very well money and condition wise. but the basic sums tell me that isn't really an option anymore post brexit, got me wondering though…where ARE secondhand cars on Irish dealer forecourts actually coming from nowadays? secondhand RHD motors can only really come from a couple of places outside of the UK really, no? Japan, SA, Aus etc. so studied JDM a bit (back in the day I recall some mates landing in nice Impreza's etc from Japan) and was interesting to see nice Audi's, VW's etc on some of the auctions.

but when all is said and done with the shipping, duties etc. is there any major savings advantage to be had out of buying likes of a fresh decent graded VW Tiguan 2019-2022 grade 4-5 or similar at Japanese auction and landing it here? or would I just be going around in circles….