Laptops are too propriety to be able to build... I'm sture you could probably find the individual parts on ebay but it would probably end up costing more to build than to buy a new one.
AMD Athlon 64 3000+ (Overclocked to 3300+)
1GB PC3200 DDR
2x200GB Seagate SATA RAID 0
BFG 6800GT OC w\\128MB Ram
2x 19\" Samsung 930B LCDs