No, you have about summed it up. There is the Camberspar that I mentioned and the Hoyt Jib
Boom you found and that's about it.
Not a lot of boats have staysails anymore, the Camberspar is not roller-furled and the Hoyt system must be designed for the forces, which costs extra.
Besides, most boat-buyers are very frightened of anything they perceive as "new" or "different". Roller furling
can still get hotly debated, along with efficient underwater foil shapes, CQR
and fisherman anchors, etc. Sailors are, in general, an extremely conservative lot.