I haven't gotten new pictures up yet since Webshots died, but unless you're doing forks seals and want the whole kit with the fancy damper rod holder, just get a 10mm (1.0 pitch) bolt from the hardware store and a couple of nuts for it. The longest bolt most carry is 50mm which will work fine. Lock the bolt to the top of the damper rod with the nuts and hook it's head with a coat hanger.
The special tools custom made for some of us old timers by Andy Hand are lengths of aluminum rod stock drilled and tapped in one end to 10mm (1.0) and a cross hole I the other end for a T-bar or cord loop to hold the damper rod extended while the spring is compressed and the stopper C-clip is slipped under the locknut. Both of the STOC fork seals R&R loaner tool kits have this custom tool.
John [I don't do PMs on this forum]