I can't remember if it it was in this thread or another, but someone described a 1913 mount ideas as plate held against the back of the receiver connected to a bracket that uses the holes from the underfolder. Tdi-arms makes an AK underfolder to 1913 and buffer tube adapter that matches this description. I doubt the adapter would directly in the Type 81 underfolder, as I'm sure the receiver and stock socket geometry differs, but hopefully they can be used as a reference. If there's a demand, TI could commission the factory, a local, reliable third party may be able to make something similar in Canada, or maybe Tdi-arms would be willing to modify their design to fit the Type 81 for Tactical Imports to sell here. Again, for reference.