I have exhaustively looked online and have found a few options that look good. However, the JBL woofers are actually surprisingly robust. The problem with many of the aftermarket speakers is two fold: 1. they are largely 4ohm, which halves the available wattage to the speaker, and 2. the resonance frequency are typically quite high, making them largely useless below 100hz. This is fine if you have a 10-12" subwoofer to take up the slack, but with the stock 6" sub I would like speakers that go a bit lower to match the factory.
The biggest reason I am looking for salvage speakers though is that I would want to replace all the speakers at once, but that won't be done until I can get tires, lift, Vaistech, and maybe rock rails. I just want something affordable to hold me off until that point.
There are also other odds and ends I would like to replace, so having a resource for used parts would be very useful.