I've just checked in Schneiders archiv site, there doesn't seem to be a 150/5.5 Tele-Arton. 180/5.5, yes. Perhaps you misread or made a typo. Anyway, all of those lenses will cover 2x3 well enough.

You may be able to use the Galvin's back on a rigid bodied camera.

You can use the Galvin to measure the lenses' flange to film distances. Set the camera up on a tripod, put a lens on it, focus on a distant subject, and you'll know the lens' flange-to-film distance.

You'll need a helicoid for each lens. $$$, unless you're a very capable machinist.

If you want to shoot 2x3, your best bet is to use the Galvin.