can i still get spares?

I have a glowworm fuelsaver F boiler with the following problem.Been away 4wks so turned off boiler.Upon return i find the boiler will not fire up.I have a pilot light ok but main gas will not kick in.I stripped and cleaned gas valve and there was quite a bit of ash in it.electronic ignitor continuously flashs.The 2 field coils
located on the 2 arms could have something to do with it.Any suggestions?