I live in the UK and have found a vendor that are selling the cheaper asus p4GPL-x. Here is the link to the shop. I'm sure they would ship one out. I have looked everywhere for the p4gd1 and found a couple on ebay but they are going for 100-150 GBP. Would rather get the cheaper one and spend the rest on a better graphics card.
I have the P4GPL-X, good mobo. I noticed a significant speed up from the 875 chipset. Overall the computer runs smoother. Unfortunately it only supports 2 DIMMs of memory, so if you're thinking of upgrading memory get the other one.