My delta roman tub faucet is leaking and am trying to replace cartridge but still leaking from faucet

Looking for supplier of Foremost Faaucet. Black cartridge for foremost faucet looks ike pic

I work a 40 year old apartment complex. Most of the plumbing fixtures are Moen products. In some cases I have been unable to remove the cartridge to resolve a leak in the faucet. I have a cartridge puller but in a couple of cases I have actually pulled the stem (center section) out of the cartridge...

No ht water in kitchen sink or dishwasher.. how do you remove the cartridge in the faucet.. I've removed the areator already.

Sir: Recently I installed a Moen cartridge in a bathroom sink faucet, after which the cartridge worked well. A few days later, when turning the handle right as you look at it in order to get cold water, a loud noise would emit almost like their was air in the pipe. The water pressure would weaken. ...