I thought one might could be scrounged from Ingleside.
Turns out they're fairly expensive and don't get replaced all that often, so appropriating one would likely be a bit more high viz than you really want.
Might be time to explore other options.
McMaster Carr has these babies:
"Quick Release Lifting Hook" (pg. 1403, about 1/2 way down the page)
Or maybe a simple Pintle hook setup could work? They're cheap and plentiful.
Clevis connectors with a pin that could be pulled out would be a cheap and easy solution, but may not be quite the design you were going for.
Turns out they're fairly expensive and don't get replaced all that often, so appropriating one would likely be a bit more high viz than you really want.
Might be time to explore other options.
McMaster Carr has these babies:
"Quick Release Lifting Hook" (pg. 1403, about 1/2 way down the page)
Or maybe a simple Pintle hook setup could work? They're cheap and plentiful.
Clevis connectors with a pin that could be pulled out would be a cheap and easy solution, but may not be quite the design you were going for.