Nice bus, as they all are......though personally I wouldn't bother with the hybrid tbh.
I can't see that it provides any great advantages and doesn't seem to offer that much in respect of economy/motive power...BUT, I guess there must be happy owners out there as they seem to have become popular of late...but you are right to do your homework..!!!..It seems to me that many peeps buy JDM vehicles without really investigating the pro's and cons.
There is a hybrid specialist in Wigan.
However, I wouldn't dream of parting with my V6 Estima for a hybrid...and in nearly 7 years of ownership I've had no problems with parts etc(service) supply...but then nowt ever goes wrong with it..lol
Good luck whatever you choose.