I am assuming you are looking for XLR-M - XLR-F balanced cables?
Besides the above mentioned, you can also get them at any pro audio/music shop local or online.
Here are a few, some may even have a store near you:
Guitar Center
Music123
Musician's Friend
Zzounds
Sam Ash
Full Compass
Sweetwater
Cascio Interstate Music
etc.
Look under microphone cables or patch cables. They can be listed with the balanced (TRS (Tip - Ring - Sleeve - 1/4'-1/4")) patch cables at some places. They are really just short microphone cables. Just like unbalanced 1/4"-1/4" patch cables are just short instrument cables.
If you ask for balanced XLR-XLR patch cables at the store they will know what you are talking about. If you ask for short microphone cables they will know you know what you are talking about.
If you are in the 3'-5' range you should be able to get them under $20 per cable, probably $10 or less. I think the last 5' cables I got were around $10-$12 per cable from my local pro audio shop.