Google is your best friend and the best place to start is with a search entering 'Renault replacement diesel engines'. However, below is a link for Renault replacement diesel engines which all you have to do now is enter the vehicle registration number and it should provide the price and correct diesel engine specifically for that vehicle.
Go to the Classic Trafic pages on Facebook where you will get more advice than anywhere else, and possibly an engine as well. They are a great crowd of enthusiats.
Please dont give up, the engine may be repairable, unfortunately the Trafic engine layout being inline is not compatible with many replacements so it would be a case of replacing like for like or finding someone who knows about these older vehicles to investigate and repair.
------------- Regards
Johno
VP and Librarian of the Renault Trafic MK1 Owners group
A day of all things motorhome and campervan. The show is held both in the main indoor arena and across the grounds. Catering, hot drinks and food options are available. Easy access to the site and free parking included. Win one of five pairs of day tickets