Amprobe made analog clampmeters for many years before Fluke purchased Amprobe. These models were obsolete before Fluke took over the product line, and Fluke never carried the test leads that they used. We aren't aware of any source for the old test leads, and those leads do not meet current safety standards.
Newer Amprobe models use standard 4mm safety shrouded test leads. Amprobe has a relatively small selection of replacement leads, but test leads from Fluke (https://www.fluke.com/en-us) and Pomona Electronics (https://www.pomonaelectronics.com/) are compatible.