When I spoke to the folks in the UK at Oddie, they mentioned this site as well. It's a good source for recent version of their product, but not the ones that were discontinued decades ago. The story goes that a british car enthusiast bought the remaining stock and brought them to the states back in the 70s to sell. These particular Oddie fasteners are used to lock the glove box for this british sports car and apparently were used on some Triumph motorcycles.
All you ever wanted to know about Oddie fasteners
I've been able to find some variations of the product in marine stores, leevalley.com has a brushed nickel lock, and several sites have 1/4 turn locks similar to oddie, but nothing with a plastic knob or decorative plate. These are unique.
Personally, I believe these cabinet latches add to the charm of the rig and the only options, that I can see, is if someone parts out a unit.
I'll keep looking.