Not sure, but I think you'll have to build your own.
I have not found one ,and I have been looking.
3 3/4" barrel , birdhead grip vaquero would be a great packer.
Blue or Stainless.
They did model KBNVBH-34 model # 10515 large frame Vaquero stainless 4 5/8" black micarta grips made in 2003. Not sure if they made a blued version.
one of the wife's guns.