Joined: Jul 2015
Posts: 7,370
Likes: 3,218
From: NW Oregon
Bikes: 1982 Trek 930R Custom, '91 Diamondback Ascent w/ XT, XTR updates, Fuji Team Pro CF road flyer, Specialized Sirrus Gravel Convert, '09 Comencal Meta 5.5 XC, '02 Marin MBX500, '84 Gitane Criterium bike
that wrench is about $10 , delivered, and found easily on Ebayt or Amazone.. i've messed around trying to avoid buying one, in the distant past... just buy one.
search: RST fork cap wrench tool.... visually match an option to your fork's caps.
or get a new fork... that one might be beyond salvage/repair, eh?
good used air forks of a higher level, and Substantially Lighter weigh, are around for about $100-$150... FB marketplace and CL Bicycle parts section... and sometimes on Ebayt too.
install quite a few RockShox Rebas and Recons, and occasionally old SIDs too.
i found a nearly spotless Marzocchi Bomber Superfly once, for $25... perfect for my Cannondale M600 resto-mod.
patience and diligence is the key to finding bargains.
steerer tube length MUST be at least as long, or longer than, the fork now in the bike.
that bike uses a 1 1/8" dia. straight steerer tube.