How big would say the hook is? There are a couple molds that have the same hook profile but the smallest is 2/0. I can't even find a flat eye jig hook that looks that small.
I'm guessing maybe a #6 and 1/32 oz?
Mustad 32796NP-BN Jig Hooks Sizes 2/0 - 6/0 - Barlow's Tackle (barlowstackle.com)
I am thinking that hook is a fly hook. something like these:
Buy Kumoto KJ310 Wide Gap Jig Hook 50 Pack Online | South Dakota Angler & Outfitter (flyfishsd.com)
Fulling Mill FM5125 Jig Force Short Barbless Black Nickel Fly Hooks | J. Stockard Fly Fishing (jsflyfishing.com)
I know it doesn't help much but might give you a starting point to try and find a mold that can be modified or a custom made one.