Do an internet search, there's several folks selling tube 1/2 doors or search here. Some folks make 1/2 doors out old doors. Just about all of them requires using a 1/2 set of stk hinges and pins. The problem is the upper door pin interferes with the windshield frame when you remove it. You can probably shorten the upper pins. @69LC sells quick hinges which allow for quick and easy door swaps from full door to 1/2 doors styles.
I run a seat belt and no doors and carry a set of 2 piece soft doors on days it might rain. They breakdown, so they store easilybin the 40.
I think bestop offers 2 piece doors. I recently picked up an old set of Kayline 2 piece soft doors. Now I'm making a 1/2 set of hinges, so i don't have to use stk hinges and pins.