Benf6

Hi guys, after a bit of info and help I have a fg f6 and had a slave cylinder replaced by ford under warranty 40,000 ago but looks like it’s has gone again , Iam after some info on any decent places to get it replaced again and prices. Also woundering if I should do clutch while box is out ? And wat is a decent stronger clutch then the factory one and wat sort of price I would be looking at. Cheers ben