Is it possible to upgrade drum brakes to discs?
 

Specifically, on a 4000S 1.8 with FWD. I can't see any issues other than perhaps hydraulically related. Has anyone done a drum to disc conversion on any car?

Also, can anyone recommend an affordable store where brand new parts can be bought, such as brakes or shocks. I usually use Blauparts, but their selection for the 4000 series is limited.

Thanks