Looking for a bit recommendation.  My daughter is 14 and has been showing her horse in 4h events, she started out with the rail events and is now starting the barrels and poles.  Her mare was originally trained for western pleasure and does not like heavy hands on the bit.  She works well in a d-ring twised dog bone snaffle but my daughter needs something with a little more stop and some lift on the turns.  I'm trying to stay away from shank bits as this mare is trained to be on loose rein and neck rein with a shanked bit.  I found this brittney pozzi combination bit that looks like a possibility but the mouthpiece is 5.5" and I need 5".  Any recommendations?

current bit                                                                                                possibility but mouthpiece to wide

https://www.bigdweb.com/product/code/903R.do?gclid=EAIaIQobChMIpou-tPX05wIVBKSzCh3KkgDyEAkYDiABEgKrafD_BwE

The Reinsman Version has a 5" mouthpiece. The price at this site is pretty high, but it was the only one that I could find with the measurements.