Thanks for the replies.
The strap cutter does look like one route to go. I have now also seen the use of clicker dies. Would that also be an option?
I have made many one off strops, some single sided and some double sided. I have used latigo, horse but and others.
I have found the key is to case the leather first rolling the leather to get really firm and to bring the silicates to the surface.
I also yesterday made one using cardboard and it worked very well.
https://westernactive.com/honey-badger-knives/cardboard-strop/
Sorry for the SoCal reference. I am in San Diego, Southern California.