I picked up a cab for cheap: The cardboard surrounds on the speakers are loose/hanging & on 1 speaker (bottom right) speaker pretty much gone. My question is what kind of glue? Doing searches, I see mostly rubber cement as a paper glue. I'm thinking the glue needs to stay somewhat pliable? Also, I'm wondering where I can get some replacement cardboard for a 10" speaker - I believe Eminence for Ampeg? Back, when I was a kid, I used to use rubber cement on speakers to micky mouse them, but it always looked pretty bad. Is there a recommended glue & what's a good source for that & the surround?