no motor is unique to the car, that said i can do a bit better than $600 for the proper motor. probably a bit late now.
the c34 problem sounds like a regualator again it is somethin i can source.
1988 F31 leopard had the VG30DET in ultima trim. get on with the TV. martin smith (smity42) and my self have reworked one with all the later mod cons.
prive wise i have seen them at a consistent 450 k yen around osaka and nagoya. underside is HR31. electrics arent too bad if they have been left alone. makecsure if you buy one to note dash condition. martin got the last existing cluster cover.
if it comes with the smart key card make sure it works. people want silly money for that bit for some reason.
questions ask. i know a bit about them , martin knows a LOT about them.
could be siren time. that was don in 2008 or 2009 from memory. those have an internal battery in them that over time dies.
shoot me an email and i will send you the prgramming sheet for it.