I am looking at buying from Savage's custom shop to get a B22 FVSR but in left hand bolt. I talked with Savage customer service and they said it needed to be ordered from a dealer and not the end user customer and then shipped to FFL.

Does anyone know, or have done, work with a dealer in the Dallas area that could assist me? My local gun shop (Grabagun) said they can't do it.

You can find dealers here

https://savagearms.com/find-a-dealer

What part of Dallas you in?
Mr. Guns has 2 locations in Plano. I bet they could assist. They've helped me on a few things.

Call Jackson Armory in Highland Park to see if they can help you out!

https://www.facebook.com/AesirTactical/

This is who I would recommend to contact. I've personally used him and he has been recommended here in TexAgs before.

This shop belongs to a friend of mine. Located close to the Addison airport. Phone number on the website, I think they will do this. Not sure where you are located or what is convenient.

Freedom & Firearm Outfitters
https://ffando.com/