I bought some stuff from this place:
http://www.circuitspecialists.comThey've good prices on lots of stuff that comes in handy when building a cab. Some examples:
.187" female crimp disconnect thingies: $3.59 for 100
Self-adhesive wire tie mounts (their "low cost" ones):
20mm: $2.22 for 100
25mm: $2.53 for 100
40mm: $5.86 for 100
22ga stranded wire: $5.00 for 100ft
Plastic cable ties: starting at
29 cents for 100 four-inch ties.
Plastic spiral wrap (for wrapping bundles of wire to make it neater): starting at $2.49 for 10 meters.
Heat shrink tubing: starting at 59 cents for 4 ft.
I also bought a 10W stereo amp kit for my cab for $14.00.
In particular, I went crazy with their self-adhesive wire tie mounts, using a bunch of them in my cab and CP to keep the wiring neat. A bag of 100 goes a long way.