I've seen something similar in MG Sharp ages ago, should've got them at the time as I think these are only made in small batches. japanese stuff is 1/80th scale isn't it, that'll do fine.
Phil, I didn't want to go with HO/OO track, yeah it would've made things a lot easier but I've been used to seeing 'too narrow' track as a long time British OO modeller and I thought it best to continue the theme! By my reckoning HOm/TT track in 4mm/ft is 3' 0", 3 3/8ths" too narrow is a discrepancy I can live with, whereas HO/OO track in 4mm/ft is about 10" too wide, for metre gauge.
Apollo, thanks for the tip off about the model railway shop in BKK, will seek it out this time.