If you want 5-10% cheaper than the US competition (sad but true, sorry) but you want your parts out of the door within 3-5 days max (instock or not!),
Design911 in the UK will get your mood back and more. They shoot by FedEx... and your order is at your front door in less than 10-12 days. The guys at Design911 gets their own part orders every 2 days so they don't screw up dates and stuff with their customers
Very serious business only.
I've ordered every parts that you can see under a Boxster (suspension wise). Front + rear. Rest assured that if you do the same, your car will be back to exactly when it came out once from the dealer.
karl@design911.com a scary brilliant chap. Simply the best service I ever had RE parts shopping.