No, if you look at how the drop/rise shanks work you'll understand why.
14" is a BIG difference, sounds like you're trying to use a bumper-mount tow bar on a Jeep to tow it behind a motorhome. That is a lot of leverage put on the shank and the receiver itself, too, and it's not surprising that you're having a hard time finding a shank with that much rise.
If they make a baseplate for the TOAD then I would go that route so that you get your tow bar at the proper level/angle rather than trying to hack something together. Safety is paramount, do it right. The last thing you want is for your TOAD to become a land missile.
2017 GMC Canyon - CCLB, 4x4, 2.8L Duramax, ARE Z-series shell
2013 Shamrock 21SS