Details needed 1912 model FN .22LR single shot

This is a pie-in-the-sky request but wondering if anyone out there has one of these. Reason is I was given one that is now basically working except the bit that pulls the halfmoon extractor back is missing. I need to see a working one to figure out if making the part is do-able.

Have scoured the Net but no useful detail found.

https://i.vgy.me/zyC3dj.jpg

thanks guys.

No, I have a Slazenger and it's a bit different. Yeh, everything is makeable but a heap harder if you don't know the design details.
@muzza- I used to be in AA and get Ted's auction catalogues. Could you possibly PM me some details as that sounds about the only possibility. Thanks

@6x47 check your email