You might be able to adapt a drum and halyard swivel to that extrusion but would bet it would blow up. Looks to be PVC or some other plastic so won't take well to the twisting at the ends. Think you'd best start looking for a used furler system if new isn't in your budget.
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Peter O.
'Ae'a, Pearson 35
'Ms American Pie', Sabre 28 Mark II