They'd have to alter the rear end to accommodate the Mercury style trigger block (with the later Airsporter RB2 two bolt fixing) and copy the Challenger stock in walnut with the later Mercury pointy style front end to the stock (or even some Prosport style flutes), keep it graceful with elegant flowing lines and absolutely no maxigrip scope rail or higher end block like what's on the Challenger.
I'd buy it.
Pete