I posted this last year... it should still be fairly accurate:
I've got a similar problem with my cover and sent an email to Loop-Lock a few days ago and this is their response:
Thank you for your e-mail. We carry Patch Kits that are self adhesive patch size 4" x 8" and come 3 to a pack for holes 3â€ and smaller. Larger holes need to be sent in to be repaired. The patch kits cost for Ultra-Loc and Green Mesh covers are $18.75 plus shipping. Mesh Blue, Black, and Gray patch kits are $19.75 plus shipping; we accept Visa, MasterCard, Discover and American Express. Please send your address and phone number along with the type of cover you own and credit card information so that we can further assist you. If you have any further questions please call our Customer Service Dept. @1-800-562-5667.