Selva were produced in Italy, and it seems are still being produced
www.selvamarine.co.ukI would get in touch with them and see what availability is like, as I'm not sure who gets them locally. Was it Jupiter in Mosta?
Never heard much about them so can't comment, but I don't think they were hugely successful or anything.
When I was thinking of buying a second hand boat, most that were on offer were with 2 strokes and that was putting me off, simply because fuel consumption is so high, and with current fuel prices due to go up I wasn't keen on the idea.
You could always reason that you'll get a few years use out of it if the boat is good and then change engine later on.