So I'm interested in the pickups alone, and have other guitars I could put them in. I know there are other staple P90s out there, but I find them price-prohibitive. I see a few sets of pickups here and there on Reverb and Ebay claiming to be Gretsch Fidelisonics. I don't know whether they are or not. They look alike, but I see something really odd...
Of course the thing about staple pickups is their unusual rectangular pole pieces:

Real staple P90s show the poles being rectangular through the whole pickup, but these listings purporting to be Gretsch Fidelisonics keep showing round pole pieces on the back like this:

So for anyone who has a set (especially in a G2655 because Gretsch doesn't sell the pickups alone), a couple questions... Are they real staple pickups, or just round pole p90s with staple looking tops. or some other explanation? Google's not answering these. Thanks!