Hey Justin,
I love Tackle Warehouse, but I wouldn't buy my rubber from them...way too expensive. They carry the Rainy brand. Rainy has been a good company for years in the fly fishing / fly tying industry. She has a good following and makes a good product...dry flies, foam bodies, rubber legs, etc. But look at the price...$2.50 +\- for 10 " of rubber. You will only get two, maybe three jigs out of the package.
I'll be the first to admit that I have a "personal problem" when it comes to buying fishing stuff. (Ask Jason. He knows.). I usually buy my rubber in one pound quantities for about $23 +/- a pound. You can also buy in lesser volume for higher cost.
I suggest you google "round rubber jigs". I did and came up with about 10 pages of hits. I have bought from both Barlows and Living Rubber with good results. I'd pay particular attention to colors carried, sizes carried, and price.
I hope this helps.