Regarding:
Item 4 was what I was meaning as I looks pretty much the same.
https://www.milsurps.com/attachment.p...4&d=1269537281
Yes, I know that's what you meant, but as I said above, your LEC has nothing at all to do with those BSA sporters. Completely different model and maker. Yours would have originally looked like the photo that jrhead75 posted. Someone cut it down.

I wish you the best on the restoration--it will be difficult but worth it.