I have a Smith T-top bag, bought it from Jamestown Distributors. Here is the link. I could not buy the T-Bag because of the big logo, would have gotten my balls broken too much. ANyway, I also like the Smith because it closes with velcro, not a zipper that could be rusted and frozen up when you actually need to open it in an emergency. Also has a nice underside mesh pocket for charts, and side pockets for other items.
Good Luck
CE Smith T-Top Storage Bag