What company are you looking at?
Cost may be so high to "suggest" going w/o mounts and scope on the double.
I am with safariman - scope never look right on a double to me. Here many have them for drivehunts - set up with lowpower variables...
I always think, a bolt might work better for these guys...
Doubles for me with open sights only. That said - I doubt, I will ever be much of a doubles man.
Levers & Bolts for me...
Eyesight is an issue... bummer.
Perhaps look at one of the euro companies (Blaser, Krieghoff). Scopes are regular to them on doubles.