Hi ya Bahnsy
It depends on how original you want it to look. If you just want a period front plate, there's always a few on eBay in the U.S. and cheap too.
I don't think Nightmare do one. DC Plastic do, but it looks nothing like original. Very modern looking thing.
I've got one off my '84 that I don't plan to use as I want the Maier one. It's not particularly good but it would scrub up ok. Your more than welcome to have it on permanent loan it if it gets you out of trouble for CD5.
The only time I would want it back is if mine is ready to ride and I haven't found the Maier one yet.
Which isn't going to happen any time soon...............