So I just did not have the money to spend on buying the really nice Kawasaki cases or really any other side cases. I set out to build some for around $100 and this is what I came up with.
Start with all the parts, found the cases at a local army surplus store. I had gone in for ammo boxes but found these night vision cases. They are lighter, waterproof and I can lock them. Found the rest of the parts at Lowes.
Mounted this bracket I found in the build your own fence gate area bolt is a M8 1.25 and 1.5" I think.
Drilled a couple holes in the side to match the bracket then used a rubber washer on both sides with a normal washer on the inside as well as used bolt that are much harder to get off from the outside. Ignore the chain I ended up not using it.
Used a U-bolt on the back to attach it to the frame again. Don't make my mistake on the first one. Make sure the U-bolt is tilted at the same angle as the frame. Again rubber washers, normal washers and nuts used on the inside.
For support on the bottom I had it sit on the passenger pegs, so this won't work if you 2-up but my wife doesn't like the long trips anyways.
Cut the bolts down on the inside and throw some locks on it then call it a day.
I did buy a magnetic tank bag off craigslist for $40 as well.
I used some gun lube to go over the rubber seals on the inside of the cases to freshen them up a bit and help them out in the long run.
The chain did not work out because I couldn't get it to glue on the inside very well and I did not want to drill more holes. I ended up using the super sticky velcro and that seems work pretty well.
Testing it out this weekend on a road trip.