I bought traditional "burrito tubes" from agrisupply.com for a few bucks each.
https://www.agrisupply.com/manual-ca...rene/p/109315/
https://www.agrisupply.com/manual-ca...tyle/p/109316/
This is a larger one I didn't buy.
https://www.agrisupply.com/mega-larg...ster/p/109317/
The large holds a standard Scotch bottle, and the small holds 3-5 cigars depending on the vitola. I put another large tube on the right side. I used a variety of hardware and some rubber-covered cable clamps to go around the side case frame.