Hi Howard,
I've got pair of the 'L' shaped mudguard brackets for a A7/10 plunger - they may/will need some attention depending on finish required since they have seen some 'life' I guess. It seems to narrow slightly at one point? Pics below of left hand bracket to ensure we're talking about the same thing - but I am in the UK, guess it depends whether you find one/set closer to home?
They'll be here for some time so if you need them just send me a PM.
Cheers
RoadRunner