Much prefer the plain ones to those with Yamaha printed on which disappears under the edge. Had to vinyl spray mine away!
I think there's probably enough material to gain a bit of extra foam - half an inch of soft foam either side ought to be doable. Careful though - worked with a girl once who stapled her finger to her accounts:-0
Ride safe, staple safe,
Simon.
he did mine with a marine gripper material it stretches in all directions and just went straight over the original cover didnt require any seams and is tough as nails