You failed to mention what gun you wanted to know about. The short answer is yes, provided you have enough money.
Contact the maker for a set of instructions.
No. Iron sights or peep sights (aka aperature sights) are the only type allowed for the merit badge.
You can get quality gun sights at a local gun store, or at a website that sells these goods. To find quality gun sights, you should check reviews by other people, or ask people you know for suggestions.
yes, you have it all set up at the right height and size and use the peep to help line up
Yes, I have one with the base and no peep. I am trying to find one everything I have found is that the original site was made by Lyman.
Winchester was very accommodating to their customers, so it would be possible for a model 94 to come factory equipped with a peep sight. But it would have had to be special order, standard 94's came with open, buckhorn type sights.
try here http://www.brownells.com/aspx/NS/Home/default.aspx or try Williams Sights I don't have the link handy
The carbon will darken the sights and cut down on reflection/glare.
Look through your iron sights, or plastic sights, or whatever.
i would look to gunbroker.com,and look under gun parts/sights. E-bay may have one also. Numrich (GUNPARTSCORP) has some of the parts, but not the discs.
Have never seen an ad as you have described- sorry
gun shop, gun show, want ads