Welcome to the forum Tweed,
I'm in southern York County and I get my EFM parts from Mark's Supply in Shenandoah PA. 570-462-0748;http://www.markssupply.com/
Joe and the folks up there have been working on coal stoker boilers and selling parts for a very, very long time. Most of the time I get parts shipped, but once in a while I am up in that area and I get to stop in. A lot of neat stuff to see there, if you like coal stokers of course!
Also forum member Scrapper23_jr is an EFM dealer. You can send him a PM. Great guy to deal with to.
The feed pipe holes are 1/8" I believe. I'm not sure how far from the end of the pipe they are though.
Maybe an inch???
If you don't have an answer by tomorrow I can go out and find that piece in my scrap bin and measure it. I'll probably do it anyway now that I know I don't have that dimension written down.