Was there ever such a thing as a wireless PS/2 mouse that had a small integrated dongle receiver instead of a bulky block that was intended to be set on a desktop tower?

I see a lot of those "wireless" PS/2 mice on eBay, that are only really useful with a desktop configuration, not a laptop. It'd be nice to have a little mini receiver that plugs into the PS/2 port, takes power from it, and receives the signal from the mouse, the same as a modern USB mouse receiver.

The reason I ask is because with my old laptops, I tend to use PS/2 mice if I can, because they generally only have one USB 1.1 port and I want to keep that open for data transfers and other things.