Roughtrax sell both types of lift pump, genuine Toyota with heater and without and Milner's sell what looks like a pattern part (no heater) much cheaper.
Thanks Karl.... I've think I've eliminated that as the fuel filter had been on for 2000 miles and everything seems to be bone dry.Just before I bought my 120 the garage that serviced it rather cleverly cross threaded the primer head on the fuel filter - then it wouldn't tighten properly and wouldn't hold vacuum so had to be replaced...
I don't know if mine was actually leaking fuel or just enough to let air in. If you press the primer plunger and get it hard then leave it a few hours, does it stay that way?
You're wondering if it's the high pressure fuel pump? I don't think I've heard of them being a problem on the 120s but.... !