I'm sure that you have probably got a specimen of the Crosman "Bullshooters" full page advert on file:
http://i649.photobucket.com/albums/u...ShootersAd.jpg
This is the only pic that I could find quickly, and unfortunately the print is not very clear, but under the "Grips" heading, it does state that left hand grips are available for both models.
I have representative NOS samples of the left hand grips, in both the brown swirl and all-black in my collection.
To the OP - my apologies for getting a bit off topic.