Have you got the bulkhead already? Cheaper to find one yourself then have it painted/ protected or galvanised then have it fitted.
Just replaced mine on 200tdi, big job and if ever I have to do another ill do it myself.
If your getting a garage to do it get a price for the job, not what they charge an hour or could run up a big bill, also budget for chassis welding under bulkhead, other parts like door hinge spacers proberbly worn, heater cables ( mine were past it) all new clips/ nuts/ bolts etc, replaced my windscreen and rubber, gearbox tunnel covers proberbly rotten that bolt to bulkhead, expensive new so find on eBay etc, speedo cable? Mine was shot, basically be prepared to have to replace other parts as it's not as straight forward as it looks.