just about to get my B series tested and back in service

selling my 172 clio as i feel a little bit grown up, that and you cant get caving equipment, snowboards etc in the clio :p poped on to have a look about, dam things been doing the old loss of power + ecu warning light for the last year or so.
used to be my dads but i've bought it off him, B series lwb diesel with 32,000 on a Y plate for £2250

so can do what i want with it now which will involve big roof rack, making a bullbar, rock sliders and sump guard and prolly a suspention lift. can you get an axel of something with a diff lock that will fit these?
chris.