bonny,
What are your machining abilities, I mean what is your experience?
The reason I ask is because I did the designs for a fraser type gun a number of years ago and built it. I have shown a picture of it on here in old threads, you may want to search. If interested we can discuss. I am not interested in any pay for what I have but if this is your first time machining something it may be not the right place to start. But if you can tackle then let me know.