Dicks Sporting goods and Walmart.

I buy the Bell cable set from Walmart for the inner wires only and trash the unlined housing. You cant beat 4 cables for $6. I buy individual cables from Dicks as needed because they have lined housing. In most instances the housing of a single cable is long enough for both the front and rear brakes. $2.99 for a Dicks cable w/ lined housing plus $1.50 for a WalMart inner wire.

You cant beat $4.50 for 2 lined brakes cables.