If by "like a Sabot" you mean a Naples Sabot, then there has to be a web site for them, you could check there for used gear.
By no "rigging" do you mean no mast and boom, or just no sheet and blocks?
If the latter, you just need a fitting on the end of the boom to tie or shackle
the mainsheet to, then a double block (two small blocks at 90 degrees to each other, traveler goes thru one, sheet thru the other). Then a block at end of boom, another directly over the center piece, and a block (either with or without a cam cleat
) with a swivel, down on the center piece. Small blocks on a small pram are fine, Harkens
are among the best.
Photos of what you have, or don't have, would help. Otherwise, the above is my best guess..