I installed this one ~5 1/2 years ago:
https://www.amazon.com/Bazooka-BTA81...03E4K7HU&psc=1
Here's my DIY thread:
https://www.ft86club.com/forums/show...hlight=bazooka
Still works great, good bass, and can be removed easily to access my spare tire.
I also purchased the remote control from ebay for $10. new last year but have not installed it yet:
https://www.amazon.com/Bazooka-RBCM-.../dp/B001JT33RI