oil cooler:
of course you can fit the cooler of a 34L or 55W and even the one from 1VJ or 3AJ.
other good coolers you can get here:
http://www.kedo.com
i recommend to fit also a thermostat. sometimes the coolers are too efficient and the engine likes 80°C.
tank:
cannot be fitted without modifications.
you have to modify the rear fixing point (tenere: 2 bolts) and you need the tenere seat.
have fun!
klaus