D911 are very competitive, for most parts. Compare them with Porscheparts if you like. I've bought from both, as well as direct from OPCs and local indies. I don't believe I ever said they were the cheapest, it was more to use as a guide. If you would like to be helpful enough to share a source that's as comprehensive and easy to browse as the D911 website, then that would be great: I'm sure a chump with too much money like myself would find it a valuable resource.
Maybe I was overstating that there are no carry over parts from the earlier cars to the 996, but any parts there are are inconsequential and I've yet to come across any. However, if you'd like to produce a concise list of the interchangeable parts then feel free to share them. Bearing in mind that the 993 was essentially the same car as the original produced 50 years ago, the 996 is the same as the 997, and the 991 is only the third true 'new' 911 ever made. Look that up if you like.
Also, try reading my posts correctly next time: RMS is a couple of hundred quid, as that's the Rear Main Seal between block and 'box. The IMS is the InterMediate Shaft, which connects the two halves of the engine together and it's the bearing on this that fails. That's what costs mega bucks if it does. You can change it to the later ones if you wish, but there's still no guarantee it will not fail due to the design. This is why Porsche engineered it out of the 9A1 engines, and why a gen2 is a safe bet long term.
Thats the thing. Design911 can charge that since its website is slick and easy to use. Pelicanparts from the US is great, porsch-apart, mr auto I think?, Fraiserpart and for brake discs, pads etc ECP's rule. But they aren't as easy to use as d911. You have got more money than me I'm the first to admit it hence why I use cheaper places that are harder to use. I have no shame in that.
Got a few others if you want?
Also marzman get the ones with the aero kit. They looks cool.