I have a Kirkey 70160 halo seat with custom steel mount for sale. Great condition. No visible wear. The mount bolts right to the OEM seat fastening points. $500. No shipping. Will have to come to you via the track buddy system. I’m in SE region. Should be easy enough to get the seat to MidS, Great Lakes, MidAtl, and Florida regions.
Kirkey makes this seat design in 14, 15, 16, and 17" widths. This is the 16. I’ve a 31" waist and the seatbase is a bit too roomy for me.
One of the charms of an Aluminum seat is that many designs are adjustable. This seat is adjustable for torso height, which means you can set the halo at a height that allows your beady little eyes to peer over the padded bar, hence peripheral vision.