Wheel truing stand for 20mm hubs?

Enough of my wheels seem to be bent, broken, cracked or incompatible in some way that it makes sense to learn how to build and true them. I’ve go the wheelpro book but not sure I fancy making my own stand, not being that accurate with a jigsaw.

One of the wheels I’d like to build will need a 20mm front hub. Is there a wheel truing stand that can take 20mm hubs. The only one I can find is the most expensive Park one at £250+ which still needs £30 adaptors. Is there a cheaper way?

When 20mm first appeared I had a dummy axle made up to fit a normal jig, but they’re available commercially now. Afraid I don’t know who makes them though.

I think this is the sort of thing

20mm Truing adapter