The peep that mount to a base is made by eabco. Don't know if they will make it for you but the ones they have are for a T/C Omega or Encore rifle/muzzleloader. You could have your gun tapped for this unit. It is called the peep rib sight.
You can contact them at www.eabco.com it is actually E. Arthur Brown Company I think is the name.
I have one of these on my Omega muzzleloader and it works really good. Shot 3 deer with it this last year.
Hope this helps.