I got mine at Ocean State Job Lot...but I don't think they're in your area. :-(

Here is a link that might be useful: Ocean State Job Lot

I did a lot of web searching for a solar cover to determine which type would give me the best insulation, yet be the strongest and longest lasting and the winner was Diamond Clear. Once I made that decision, it was just a case of searching by brand name and the best price I came up with was the seller whose link follows.

http://www.poolsupplies.com/covers/diamond-solar-covers.asp

BTW: Once you use the link, you can check out what else they have available, but for both insulating qualities and toughness, which is important when you consider that you will be hauling it up and down twice a year and presumably want to have it last for many seasons; I can't speak too highly of the Diamond Clear.

Also: Having once bought from them, they keep sending me special offers and the last one is a discount coupon, so if you decide to order from them, use coupon code: EA8NSRP for a $10.00 discount. Offer expires 09/22.