...or, I guess just a 21 segment step wedge?

I've got a Stop Clock Pro and a Zonemaster II, but with all the paper testing and shuffling I've been doing, the old calibration of the Zonemaster doesn't match the papers I'm using most at the moment. I was lucky to find the specific calibration details for the paper I was using on the RH Designs website last time I needed to tune it, but no such luck this time.

So, if anyone, preferably in VIC where I could just pick it up, have a calibration kit that comes with these units? Or possibly even just a step wedge that would still be accurate enough to do the trick? I'm happy to come pick it up, may need to borrow it for perhaps a week, to give time to compare dry print results as well as wet. Can compensate with beer money