Dressage Bits

Whoo Whee... Now, after deliberately riding dressage for, oh, about a month, with a horse that's bright, talented, and willing, I'm loving it! The detail, the intricacy, the focus... :) pretty cool!

Ransom was presented to me in a slow twist full cheek snaffle. OOPS! Not USEF/USDF Legal...
Rule book says..

Figure 1. Bits Permitted in Dressage.
All bits (in A and B below) must be smooth and with a solid surface. Twisted, wire and roller
bits are prohibited. A bushing or coupling is permitted as the center link in a double jointed
snaffle, however, the surface of the center piece must be solid with no moveable parts.
The mouthpiece of a snaffle may be shaped in a slight curve, but ported snaffles are prohibited.

Short of trial & error guess-work... What should I be looking for that's lower-level legal, but still has the same (or close to it) effect of the slow twist full cheek? I realize now the twist makes it illegal.. great for the hunter ring, not so much for dressage.

TIA