I'd like to run a headspace check (field gauge only) on the WWII era 8mm rifles (K98, VZ24, WZ.29, etc) in my collection I have but I've been reading about the difference in the 19 to 20 degree headspace gauges. Anyone know where I can buy, rent, borrow, etc. a correct 20 degree field headspace gauge and not the more commonly see 19 degree one? I know Forester used to sell one but it doesn't look like the no longer do!