Do you know any scrappers who supply RHD Tempra Body and interior parts?
I tried parts gateway and the likes but in vain

There are often Tempras on Ebay that are being broken for bits, I've got several of the harder to get parts that way. Search for "Fiat Tempra" there and see what gives, you may need to wait a few weeks for one come up.

I've got a 1.4 Tempra fully complete. The problem is the engine Rest is fine. Interested?