My Oreck XL3120 doesn't have an outer bag, and I couldn't find one for that model. What I did find though are these outer bags. My question is which one would look the best with my Oreck? The last one in the bottom row comes with two outer bags, but no clip that say "XL Extended Life" Below is a picture of my Oreck and the outer bags for sale on eBay.
Here is what the machine originally looked like...
So I would go with the top center ( 40th ann. bag). Otherwise I would say the bottom right red bag but there is no clip so its not worth it. BUT!! You can just spring for another Oreck. If you dont have the original bag the machine looks unusual in my opinion and looks like a junkyard vac (pieced together like junkyard cars are). So its up to you but I would spring for another, there are a few yellow Orecks which are rare that are online on eBay. But its all up to you my friend. Anyway, good luck!