I have one that is 1:14 Here is the link to a few pics. Someone on here has a 1:26 (or close to that) I think it may be Cehrabehra. What are you looking for, do you have one in mind?
Not in a ring yet (in fact just purchased today!!), but I wanted to post mine because I think it''s a good example of a cushion that''s rectangular but not super long (1.1 ratio, .81 F VS2 EX/EX from Mark at ERD).
Mark T. would be Mark Turnowski of Engagement Rings Direct, known around here as ERD. He's located at the corner of 5th Ave. & 47th st in New York City.