It's so annoying, everyone looks at me although I've just passed my test, even rolling up to a stop at idle and slipping in gently like I used to without grinding, does work anymore

So I shall source a new gearbox. I just have a question will a Gearbox off a Xsara VTS Phase 1 fit, I've heard these are pretty good especially if you want more power, which I might at a later stage, might stick the GTi-6 Manifold on the Inlet and Exhausts and maybe a cam regrind too but that's a big might. Or a one of those 6 speeders off the gti-6 with the superbly close ratios? heard they eat the juice though due to the higher revs.
Also the cambelt is due for a change it's on 68,887 now and even though my car was advertised with FSH, guess what I didn't get it

How much for a cambelt change and new waterpump whilst it's off? Any good estimates?