Hi, sorry if this is a bit late...done mine at the beginning of the month (1996 2litre EL, so don't know if the same for a Diesel).
Got the pair of vented front discs and pads for £53 inc VAT from Central Auto Supplies in Bedfordshire, just gave the bloke my reg no and he looked them up (website is central-auto.co.uk). They're midlands based...seem to have branches from Birmingham to Peterborough to Colchester.
Was also looking at eBay but prices about the same.
Good luck.