Where to source crimp dies for small uninsulated wire terminals
Dies are generally not interchangeable between crimp handles, and not all crimp handles will have dies for all terminals produced for them. I tend to use crimp dies that can support D-sub for a lot of smaller things but not many replaceable die crimp handles have a D-sub die (which is one of the main reasons I chose the crimp handle that I did). Then there are, of course, crimp handles with non-replaceable die.
GreenLee PA2097 is the name of the die I use. It goes with the CrimpAll handle but if you give me relevant dimensions with a micrometer or caliper (not a rule), I can tell you if it will fit your handle. Critical dimensions include hole diameter, hole spacing, hole distance to the rear of the die, internal width of the jaws of the handle, and spacing between the edges of the handle's jaw when closed.
I've not actually seen a replaceable die for a ratcheted handle that small. There is the Engineer Inc. PA-09/20/21 but these are not ratcheted and I've been told they will not apply enough force to cold weld for long term reliability, though seems to be good enough for hobbiest purposes.