You will need:

furling drum

top swivel

shorter forestay wire (can probably shorten the existing one) so it goes between the swivel and the drum.

pigtail forestay for the swivel to the mast hound - may be able to shackle the swivel right to the hound with a long or doubled up shackles.

Block for jib halyard

lower cleat for jib halyard (must cleat on the part of the forestay that turns) - this is usually a metal piece of hardware that pins to your forestay chainplate. Alternatively, you can just tie the halyard to a set tension.

furling line to go from the furler to the main beam (on a jib, it doesn't need the purchase that Doug showed in his drawing. For a screacher, you need the purchase because of the long foot length.

cleat on mainbeam for furler line.

you may also need longer jib sheets since they now need the ability to reach all the way to the forestay for when the sail is furled.