Id buy a new one if possible, not that easy to remove from a car in scrappy even if they are in 1 piece unless car is on good solid ground and you can get a jack under the engine.
to swap it, assuming you have an 1.8-2.0 8v:
1. pop header tank off bracket and place out of the way (no need to disconnect any coolant pipes)
2. pop off the 2 link rods from linkage on alloy bracket bolted to gearbox
3. undo large middle bolt from mount, jack gearbox up as high as possible
4. locate 3 bolts holding linkage bracket to gearbox and remove
5. undo 2 bolts holding mount to subframe, swap mount