Thanks Giles, handy to know. Since the previous owner had the whole regulator replaced, I thought it was the only option if it fails again.
Maybe I've been lucky covering 100,000 miles in my previous LPG converted GS300…haven't had any problems. In contrast, the system on the 430 has only been on there for 18 months / 10,000 miles and it's already on it's 2nd regulator!