So far it appears the only available internal items are from an R/C kit that consists of a large, smooth plastic cylinder with rounded ends used to hold R/C gadgets and containing several additional transverse bulkheads.
Of course, you could always use wrapping paper cardboard tubes, or tape paper- towel or toilet-paper tubes together with a ping-pong or golf ball stuffed in each end and painted grey
. Hey, at least it stops one from seeing right thru
.
Maybe some of the folks molding resin towers and accessories can come up with some other after-market ideas. They would most certainly be
.
"Should we prosper it shall be as is our custom...by Miracle!"