I just checked Hobby People and the Maggie 91 two cycle is not available, that is no longer listed.  Might be some floating around in hobby stores or on the Bay but me thinks it is a goner like the 108 is a goner from the Magnun line.

So if you want one get the lower cost ASP. .91 or the 108.  I would think the 108 would be a stronger engine due to the increase in cubes but you never know which is race horse and which is the nag.

Chip