I just moved from Oregon and there is a place there where I purchased all my parts when I built a PC.
www.enuinc.com
I purchased XP Home for $92.00 full cd OEM, and also XP Pro full cd OEM for $146.00. The only requirement was that I had to purchase a 'computer' part, e.g. an ethernet cable, or a mouse, etc. Typically one can use the CD for 5 reinstalls.
All you need is for someone who lives in the Portland, OR area to get it for you. One store is located just off the sunset highway in Hillsboro. They also have another store on 122nd ave near the airport area (PDX).
ENU does not ship, as far as I know.
While I lived there I did find another place that does ship, but is a tad higher in pricing;
www.iguanamicro.com , located near the Intel Corp Jones Farm facility in Hillsboro, OR.
That is where (ENU) I will purchase the next time I want to build a PC. I have not found anything out here on the east coast that comes close to ENU.