Gander used to sell LEM exclusive but have since started with their own brand called Guide Series.
I have found that most of the vertical U frame stuffers are made by 3 companies. LEM has metal gears as does one of the Guide stuffers.
I have made so much sausage that i went thru 3 poly sets of gears so said heck with it and went with the LEM metal gearing and with a water stuffer.
If you have a grinder like LEM or Cabelas you can stuff with it if you have the Cyclone auger stuffer tube. If you dont then you just have a grinder thats worthless as a stuffer. Same with a KA, Great for a grinder or meat mixer using the dough hook but sux as a stuffer.