I like them, very much, especially the highly 'American' worn beneath the button-down or even polo shirt look that I used to see at Russell Street. Simple but very effective.
I'll agree FOTL tees are one of the best, any tee with a high tight collar is a must for me particularly, if I am wearing as an undershirt.
Jockey still make a mock neck tee.
FOTL T shirts were the T shirt of choice for me and my mates. Can't remember where we bought them but it was during the time we would do a morning shop in the King's Road, have a few pints and then back for the football.
Yesterday I wore a T shirt from Gap. Great quality, made in Vietnam. I will miss the Gap outlet store at Lakeside near the Dartford tunnel. It might have been considered down-market for some but I picked up some bargains there including a great sample jacket with all the correct details. I still like to shop in real shops.
I love real shops myself. There's really no substitute. There's also, all too often, a good deal of anguish involved. Gap have a shop at a dreadful, noisy, teeming 'retail park' just off the motorway up here. My late father used to bring bits back from the US, including a jacket with a pad on the right shoulder - you know, for steadying the stock of your firearm on a misty morning whilst out shooting harmless deer, bunny rabbits or whatever. Dad's taste, bless him, could be a bit hit and miss. Good on jazz, though. He fucking hated Shepp and Ayler.
You used to be able to go into Russell Street and buy a pack of three (I think) white t-shirts. A kind of minimum purchase for me if my daughter was agitating to go to the zoo or something. "I'll only be a few minutes..." Socks were also an option. I think Jimmy would wander in and maybe buy a knitted tie. Same principle. You couldn't just walk past the door.
I made a tit of myself the first time I went in, asking JS who JS was. I'd expected it to be liking buying from Paul Smith. JS just smiled and pointed to himself.