DL52 Rocky Engine deco head gasket set needed

Forum: 

I own a 2000 Daihatsu Rocky 2.7 TD. It has a DL52 engine, for which parts are not readily availble in South Afica.
The engine needs to be opened, and I cannot source a head gasket set anywhere. Apparently even the suppliers do not stock it and have it only manufactured on request, which can take up to 6 months!
Can anybody help?
To replace the engine with a Landrover or Toyota engine is not an option to me!