Hello and welcome to the club PPuxley.
Sounds like you're not exactly a beginner and have found the ropes already.. Looking forward to a build thread.
Darren is almost right, I bought a collection of silencers, but I do have some to spare.
I wouldn't pay too much attention to the part numbers as I even have some stamped lafranconi and some stamped Remus, they are identical.
The silencers I have left are the Lafranconi/Remus "pair" and are a little scratched, but what I do, and indeed what Buzzer did, is polish off all the anodizing so they twinkle in the Sun and look better than new. I gently core mine too, just so's you know it's running without frightening the horses..
