Cactus Stitchin's screwdriver can probably be found at Harbor Freight.
You should probably send a picture of that one AND whatever your husband comes up with to the manufacturer and say the same things...."For $4500 you'd think...!"
[I am absolutely convinced that that kind of consumer complaint directly to the "main man" (from me 20+ yrs ago) is the main reason the Fiskars rotary you use today will likely NOT cut your thumb off when you close it!
]
Jan in VA