I know this pack doesn't have speakers, but I just bought a XFMT Chopped Tour Pack Trunk w/black hardware and black luggage rack & king backrest off Amazon for $270.99. Seems to be of decent quality and comes with trunk liner and all black hardware.

I also purchased a US Stock Moto Onfire Tour Pack Plate (Advanblack) black laser cut inner base reinforcement plate for the pack to sit on. Was pricey at $59, but the plate fits exactly to the XFMT chopped pack base. I then used plate as a template to custom cut a galvanized piece of metal for the inside of the pack with snips from ACE Hardware for $9.99. This allows me to "sandwich" the bottom of the pack for added stability. I found all the necessary nuts, lock nuts and washers at ACE.

I couldn't find any M8 bolts that worked locally so I had to order Prime-Line 9186710 set sockets M8-1.25x80mm. The bolts came in a 5-pack and were $22.75 on Amazon.

Since I have a 2015 F6B Deluxe I have my backrest to use as a template for hole spacing. Will be fun trying to figure out where to drill the holes so it doesn't sit too far back or forward for my passenger.

Appreciate all the information on this thread. Anyone have any tips to help with deciding where to drill the holes?