So I have 89 b2200 Manuel trans. Trying to replace slave cylinder but hose line going in is striped so can't get out. Where can I find that hose to buy since one is stripped n replaced it goes up to top of firewall n disconnects there. So need that whole line just no clue what it's called or where I could buy one

 

The clutch hydraulics on these trucks seem to go out every few years, so you might want to do the clutch master as well.

There's a flexible upper clutch line and a lower flexible clutch line for these, see List: Clutch Hose - 1988 Mazda B2200 | O'Reilly Auto Parts

The trick is to initially loosen or do final tightening into the clutch slave cylinder WHILE it's still mounted to the transmission side. And to use metric flare wrench for initial loosening and final tightening of the clutch and brake lines.

Remember to bleed the clutch hydraulics of all old fluid once all is bolted back up.