I kinda like the fishmans myself, the first set looks....well kinda blah and not very strong. The spiders are cool.
You could cut a ring from plywood to fit around the speaker if the grills need to mount to wood and not the speaker itself. Just build up the plywood untill there is enough clearance between the sub and grill. 3/4" plywood might be the right size. Then cover the plywood with the same cloth or spray paint.