Hi folks I am looking for front doors for series 3 and found these guys on the interweb.
SP PANELS- Body panel Specialists (sp-4x4.com)

Has any one any experience of their kit as they look ok and price is good for complete doors

Yes I bought their galv door tops for my S2a. Good service and well made. Needed a bit of gentle "bending" to fit but very good value as they were pretty much the same price galv as everywhere else was plain. I would buy from them again but in the knowledge I'd probably have to do a bit of fitting. Thing is very few parts on a Series fit out the box and the SP door tops were well galvanised so they will do the one thing most door tops don't, which is last more than a couple of years.

Hi just bought a pair of 2a front doors for mine from Paintman Panels. Good quality fast service very helpful as I needed them modified for the anti-burst locks, well packaged in separate boxes and a fair price.

I likewise got my galvanised door tops from them - no issues and assume it will be the same for the bottoms.