Nah not really, they are six & half a dozen most of the time, if a part is more expensive then its not going to be a crappy britpart part.
I have just looked through the Paddocks site and reckon you will get 3/5 of the way there then need to turn to Craddocks for the rest, you would be as well looking there from the start to save you having to find it all twice.
Call craddocks up and tell them what you are looking for, the guys are usually really good, they almost know the part numbers by heart anyway - can save a lot of searching through what I feel is not a very well organised site.