Hi blueDuchess welcome to the forum.

I agree with timc that ATE were good - however, I have recently bought new ATE callipers and found the quality of the castings to be much worse than the old ones. I conclude that quality ain't what it used to be. Click on buy parts above and compare the price of the locally sourced part with the ones for sale here - this will at least give you an idea of value for money.

As for bubbles coming out whilst bleeding:-

BEFORE you change the master cylinder (MC) I'd look at the quality of the flexible hoses - if they look like they've been on there for some time - change them first. Cheaper than a MC.

Secondly get a pressure bleeder - the "end up in the air" configuration of the MC on these cars can sometimes (well often!) cause problems.

So before spending money on a MC I vote for new hoses and a pressure bleeder first.


EDIT:-

I forgot to say - the factory service manual (FSM) says you need to pump the brake pedal during bleeding to help disperse air bubbles

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!