Timer....when I first read this I thought to myself "what the hell is he talking about? What the heck are domes?" Now I get it , it is the snaps that are screwed into the boat. Am I right ?
www.sailrite.com is a website that has all sorts of domes (snaps) that you can compare to match yours. Something along the line of 5200 will work great when you put them back in.
Now I would imagine the screw part has come loose in it's hole. I would then fill in the hole with an epoxy, then re-drill, then attach your snap with some 5200.Problem fixed.
I hope I have helped you here.
Roger