I have the Hasselblad Scissors and they are for cutting 6x9cm down to 6x6cm. So that won't help you much.
2.25x3.25 color might be hard to source; B&W is no problem. Maybe consider outdated on Ebay?
4x5 can be cut down but it is very tricky to do, I myself have not had much success doing that.
But I've read it is doable.