Tempo Hanseat - Kettenkasten

I am looking for a kettenkasten and vor rad & schalthebel for a 52 Tempo Hanseat.
Paul

I also need some recommendations for the basic fittings -
1. radiator hose
2. electric cables
3. spark plug spec
4. bolts/sizes for the engine, clutch springs, etc.
5. etrol tank cap and radiator cap (are these a standard size that I can substitute?)
Also need all control cables
Rubbers
Windows
Bench seat
A chassis (at a real stretch!)
Any plans or schematics

I am happy to substitute similar parts as originality is not necessary.