@fmer - I fashioned them from copper pipe. Later, I learned about some copper anode strips (on Amazon) which would be MUCH easier to work with.
You need some tin snips (or a break press) to make the actual strips then drill a 9/64 hole and slide it over the binding post screw. you can use the existing stainless steel strip as a model.
Another alternative is to find a copper "ring" terminal with a small enough hole and solder this directly on to the wire which goes to the crossover (eliminating the need for the strip). I couldn’t find a terminal with anything smaller than 1/4 hole.
Note: Using the ring terminal probably voids the warranty. I saved all the strips so I can replace if new owner wants them. Also, the (stock) Fortes sound good at low volume but were melting my ears when cranked up.