Hey Blu.
I haven't got a kilt carrier.They seem overly expensive for what you can carry in them. However a tube of some sort sounds like a good idea. I still use the stocking (From the wife) to put my rolled kilt in . Two rubber bands is also good . Maybe a box the kilt is first sent in would be a good starting point.What about those tubes you see art students with they have screw tops I think.