Waco16 I'd say your only chance of finding parts like that now would be eBay or somehow getting the opportunity to sort through the parts bins at the major wholesalers, most of which are in the USA of course That said, I did find a trials foresight protector in a friend's parts bins once and years later the trigger guard surfaced from the same source, so never say never. Those parts are already on rifles by the way.
Got my fingers crossed - just like trying to find scope 3273. I know it was still around in the mid '80's