Okay, the ligatures came in today. These are the following ligatures I got:
Selmer 401 and 402
Bonade Ligature for Soprano
Regarding the RIA soprano mouthpiece:
The Selmer 401 is too small, and the Selmer 402 is too big and a bit narrow.
Regarding the RIA tenor mouthpiece:
The Bonade soprano ligature is a bit too small. Need something a little bit bigger.
@sugaki: WWBW doesn't have the sizes that fit those mouthpieces in stock. Plus, they're pretty expensive.
Anyways, back to the drawing board...