Yes, you can get new laptops with XP - many people still prefer XP over Vista.
Most name brands (such as Toshiba, IBM, HP/Compaq, Dell etc etc) are fine, just shop around for one that suits you. The big disadvantage of the lesser known brands is that as time goes by, parts can be harder, if not impossible to get. I know someone who bought a name laptop very cheaply, but a small fault caused them to throw it out because parts were no longer available. Generally name brand laptops don't have this issue.