I have an HO Comp Freeride 69" ski which came with those bindings.
Unfortunately for me, my feet are larger than my son's - the buyer, almost 20 years ago - and I've separated/expanded/spoiled the neoprene fabric between the rubber and the fastening/screw plate at the bottom of the tongues.
As old (2007 vintage) as these are I doubt I'd find any parts, but perhaps someone's taken off a set of shocks on the way up to current generation boots.
Adjustable 10-15 range is what I'm looking for, to teach other adults the joy of standing on water
Current project includes reseating all the boot plate receivers (with epoxy, this time!!) in anticipation of finding older gear with the same footprint, or, just maybe, parts or full front and rear Shocks, installing new receivers for my new boots for the 72" HO TNT I found, and keeper bar for adult trainers' receiver for the T 1/4-20 hold-downs (an HO product to keep newbies from doing the splits)...
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FWIW, I'm an old-schooler whose favorite boat was an 80s Nautique, and I also had (later stolen from my son's storage locker, apparently, as it disappeared) a custom HO 72" made for a rep, with NAUTIQUE on the tunnel:
Thanks from Grounded Pig ☺
(my call sign after moving off Flying Pig, a Morgan 461 sailboat which was our only home for 15 years)