Rico, you lucky dog,
Look at this as an opportunity. You have lots of great bits.
Treat it as a blank canvas and build 'Rico's beeza'
Have a look at Beeza Bills purple piece of art.
http://www.geocities.com/beezabill/or goffy's BSA with teeth.
personally I like Tombeau's yellow beastie with the VW pipes. They are all BSA's.
The place is awash with replica RGS that all look the same, run like hairy goats and keep the physios rich.
There is also a herd of Golden Flash, Super Rockets etc that you can't tell apart.
Just build something you are proud of that runs good, and ride it.
Start off by sticking the A50 tank on it.
cheers