Parts blueprints
 

Are there any drawings for Parkers out there with the dimensions for the internal parts? Specifically the forend iron with ejectors?

maybe...... http://parkerguns.org/pages/faq/disassembly.htm

I need drawings that a machinist could use to make the parts from scratch.

Robert,
I doubt you will have much luck finding drawings for original parts and even if you did some parts were fitted at assembly and could be somewhat different from gun to gun. I've made some roll joints for hammer and hammerless guns as well as bolt plats of the older and newer styles and would simply copy what came out of the gun while adding material were needed. I think reverse engineering in this manner is your only choice.

Bob,There are some pretty good drawings in the Parker Story for ejector parts. I looked quick but couldn't find them but they are there.

I'll take a look in the "Story" and see what is there. What happened to the drawings that Parker/Remington used? I've seen drawings for Winchesters,Smiths and Colt and I have one for the 1911 myself. I wonder if Del Grego's have any?