Hey, big Gilmour fan here, and I'd say it's safe to suggest you get a FS-1 for that Strat's bridge. This is the pickup Gilmour used during the recording of "The Wall" in '79 before he switched to using Seymour Duncan's SSL-5. I have the SSL-5 in the bridge of my American Standard Strat from 2013 and I am thinking of swapping it for the FS-1. I am a fan of his tone from that 80's and on period, and I heard the FS-1 is grittier, brighter and not as "warm" as the SSL-5, which suits my taste as far as tones go.
As far as single coils go, you can get the Fender Fat 50's like his signature Strat has, or get two SSL-1's from Duncan. I think he has a SSL-1 in the neck. I am not as familiar with Dimarzio singles as I am with their hums, I'm sure others will be more helpful in that regard.