Too far east for me, but sounds like Z&I Aero - always a propeller or two, lots of aircraft instruments and other parts, but also a lot of communications and other electronic stuff. I used to get aircraft prop pitch motors and cowl gill motors from there to use to turn my aerial masts/poles (usually ali scaffold poles!).Best place for me as a youngster was Job Stocks in St Marys Road, Walthamstow, Ex army surplus equipment from new fangled semi conductor diodes to aircraft borne navigation aids.
Kind Regards, John