I "screwed" up.

Give Sarco a try..show them in stock
P17 Safety Lock Holder Screw

Update:
Ordered from Popperts. I got several replacement parts but they were "out of stock" for the one part I needed. I ordered some additional replacement parts from Sarco and got the part I needed. It fits. All parts from both suppliers were in good condition. I cleaned them up and oiled them. Thank you for your help.

Todd