Check out Performance Audio. Scroll down to Custom Speaker Cables. They have a wide selection of colors & connectors. Go for the Canare 4S11G cable. They can build them for under $300 depending on your choices..but they will also sell you everything so that you could build them yourself if you wish.
I believe it is a Pro Audio site but many good systems & home audio cable builders are using the new-ish 4S11G cable. The 4S11 was already a very popular choice and the 4S11G is considered a step up in copper quality.
I came across this site recently when I was looking for some bi-wire cables and specifically that Canare cable. I ended up going a different route though.