MPM/Special Hobby has made a 1/72 PT-19, so we're close. You'd have to modify the kit as the PT-19 had an in-line Ranger engine, and the PT-23 had a radial Continental R-670. So a little "modeling" will be needed to get you there. If you have a spare old 1/72 Revell Stearman, that has the Continental engine, although it's not very good.