They traditionally set up on "commercial row" at Camp Perry, and this year was no exception.
They had a bunch of Retro parts, including the aforementioned handguards, as well as butt stocks (4 & 5) and pistol grips (mottled and unmottled) in varying states of condition running from nice to battlefield pick-up. Boxes and barrels full of such stuff.
Also, A1 rear sight assemblies at (if memory serves) someplace between $15 and $25.
Also the side front swing swivel mounts that fit around the barrel at the front sight tower, the reversible ones for both 625 and 750 barrels, at around $30 or so.
And a lot of other stuff.
Not much of a report. Sorry. I was on a mission for other service rifle stuff and didn't "need" anything Retro at the moment. But they might be a good place for somebody needing stuff.