I actually just had one made at a great local driveline shop last year for my '66. 3" x .083 DOM tube, new ends with spicer 1350 joints. Ended up right at $250 balanced and painted.
I'm sure Denny's makes excellent driveshafts too, but comparing any of their pricier offerings to an NOS piece is a bit apples to orange, don't you think??
I've just always thought of A-bodies as the red headed step children of the Mopar world and a numbers matching driveshaft just doesn't give me the semi that it may to others.