I've come across two sources.
Staples have tabbed folders - but the card is too light weight. I find the card flimsy so the tabs bend. They aren't nice/strong enough when filled with lots of info and dont re-use well.
So I've switched to 'Avery Tabbed Folders Heavyweight FC' - available special order from Rymans (direct for delivery or pick up at your local shop) or Viking. They come in 5 colours. I'm using blue at home: code 20613 and Buff (20612) at work. The others are Green 20614, Pink 20617 and Yellow 20619.
They are a pleasure to use, robust when used on the road and re-label well. So I think it's worth the investment.
PS Bisley make some filing cabinets which use compressor plates.