I know I can probably contact Avid to get a replacement ouside cap:

https://www.bikeforums.net/showthread...hlight=BB7+red

but just wondering if there is any good reason to get a new one. I have found that on my commuter bike which I ride in the rain and light snow that the inside pad is basically so stuck, I need a wrench to adjust it and the outside pad is so stuck I need a wrench to adjust it anyway, which means I generally take off the red pad so i can get more purchase on the little knob the red cap basically adjusts. I've stripped the cheapo plastic cap such that it is ineffective anyway. Any reason I need the red cap since all it seems to do is to turn the adjustment rod to set the pad space and plus, the one I have now is stripped. Wish avid would design something that isn't cheap, some of us use them a lot and in not ideal conditions.

Jay

QBP stocks Avid disc-brake caliper parts , check with your LBS,
Most likely with a QBP account.
It can be an add on to one of their Orders for small parts.

You can order them online. JensonUSA.com is one place I know of (not a recommendation).