I recently purchased a Raleigh RSW/Stowaway/Shopper.
It needs new tires - which seem to be an unusual size.
Has anyone replaced the 16 x 2 tires from a RSW with common 16 x 2.125 tires?
Do they fit well or do they rub the forks and stays?
Or better yet - does anyone know where to get some proper replacements?

The Balloon tyres on an RSW are pretty rare; You might get lucky here but if not you may need to look into finding alternatives like some different rims in a more usual size (ISO 305 or 349 if it fits). I say this not actually knowing the stock size on an RSW - if it's already ISO 305 then you should be able to fit some Schwalbe Big Apples (fitted to Dahon Curves) that have a similar sizing and built in balloon suspension characteristics.

Thanks LittlePixel!

There was one on ebay here with BAs on it.

There's an RSW expert on the C&V forum - Viscount, he's called. He'll know.