Could be a long shot asking - I'm busy rebuilding a 1956 BSA 500cc Clipper - a rare (only 800 made) B34 off road competition bike. Its not a Goldie but is probably best described as a parts bin special made by BSA to use up an excess number of BB34 GS engines after they introduced the CB34 range housed in a GS scrambles frame. It's a real nice looking bike and there's not that many left as you can well imagine.
The bike I've got has a few bits missing most notably the magneto, which is a Lucas KNR1. If you have one could you search you soul and think about selling it to me? Its the one major part thats missing.
Cheers, Alan