Angela Holland the chiro vet is, along with her many other talents, a qualified Lantra bit fitter. She advises on bit and bridle fitting as part of a treatment, not as a stand alone, though, and she doesn't carry any stock of her own, but she advises on what a client already has. There are hardly other vets with the Lantra qualification.
She's just assessed my wonky dentally compromised mare's Transcend bitless double bridle as a good fit. She's previously assessed her Sabre Cordoba snaffle bridle with a fulmer snaffle as also good.
Her books might be full, though, word has really got around now.
Dr Angela Holland is a highly experienced, skilled equine veterinary surgeon providing equine chiropractic, acupuncture and rehabilitation. Improve your horses performance, enhancing mobility manage pain.