which Alaskan model do you have? Glass gasket is generally different than door gasket (Glass gasket is sometimes called "channel" gasket and has an adhesive back that wraps around the piece of glass itself). You want to be VERY careful about how much pressure you place on the glass when tightening the retainers!!! Just enough to hold the glass from moving is fine. The door gasket would most likely be a round gasket sized to whatever diameter fits (we like the gray colored door gasket which has some graphite and is more dense because it will last longer). On some stoves you will need to use a good RTV sealant to better hold the gasket in place, some stoves have a continuous deep channel that may not even require any sealant to hold it in place but using a sealant certainly wont hurt anything either way (most like the copper for its high temp rating but black is fine too).
You can always call the company since they are still in business but this is the best I can offer flying blind for you, Im certain their are many Alaskan owners here who can elaborate better or search this forum in the upper right corner for "Replacing Gasket in Alaskan Stoker"