Where to order M103 engine rebuild parts?

[BAD300]

Hi guys. I tried the "parts section" of the forum to no avail

I am contemplating rebuilding the 2nd hand engine I have managed to get. Will need rings/bearings/water pump/timing chain/full gasket set etc etc.

Could someone point me to a good supplier that I can trust to freight over here to Australia? Here is a rip off & if I can source all parts from same supplier it should work out OK. Also, a copper or SS head gasket supplier?

Cheers & very much appreciated for help. Need this car started ASAP.