Got to thinking, and man I'm sure this is going to be a dumb question, but here goes.
If I have an L6 to L14 adapter, that essentially turns my L6-30R into an L14-30R and I have my neutral. I understand that adapters do not convert voltage, but the adapter would then change it to two hot 120 lines, a neutral and a ground, correct?
Then, with that, I could use that standard US control box from Auber that has the L14 input power connection.
To be fair, I believe someone above mentioned the adapter as a good option, and my brain just doubled back on it late