Thanks guys, I found the part and a few more to go with it.
Jacks First distributors had what I needed.
Here is the link of a good list of suppliers for hard to find parts. Gun Parts Sources
I will post some pics when I get it back together.
I am currently looking for a "parts gun", not having much luck though. It's a really neat gun and the history is what makes me want to get it in operational condition.
I have a newly purchased 1916 astra .25 that I need a new firing block machined. I don't think I am going to be able to find a replacement.
If anyone knows of someone that could do this for me I would really appreciate it.