In fairness the place I referred to was used by all the local garages big and small including dealerships when working on non franchise vehicles, whilst there may be the odd "accessory shop " in town few people in the trade would be seen dead in them unless they wanted a seat cover or wing mirror

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We used to have a company called Edmunds Walker who you went to for everything from gearbox bearings and seals to engine valves, oversize pistons, bearings etc. but sadly no longer around. Thinking about it few garages these days rebuild engines, gearboxes , axles as not economically viable on modern vehicles.
When I wanted a bearing for my old garage compressor I had to go 25 mile out of town to get one over the counter, mind you when rebuilding the Sterndrive on my Volvo Penta for my boat, it had been standing since 1982 and the double UJs has seized, Volvo boat people wanted over £200 each for them but the bearing people matched them up for £7 each, so worth the round trip

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They also supplied a SKF rear hub bearing for one of my twin wheel Iveco Dailys for £57 when the Iveco dealer wanted £135 in the same box a few years ago!