What about something like this with a Clevis clip?
Clevis Pins Type: Standard Pin Diameter 67932764 - MSC
Of course, you can get this and similar at the local HW store.
I use the stack jacks too, but I don't regard them as terribly "easy" to use. They're kind of finicky IMO. They do work, and they are cheap, but I'm looking to permanently install scissor jacks where I currently use stack jacks.
__________________
-2018 Greyhawk 29MV
-2020 Jeep Wrangler Unlimited (JLU) (Primary Toad)
-1994 Jeep Wrangler YJ (Secondary Toad)
-2014 Jay Flight 28BHBE & Ram 2500 6.4L CC 4x4 (sold)