Rat Rig is Portuguese company that targets DIY, hobby and prosumer hardware market. They just announced that they are now first manufacturer of aluminum linear v-slot rails. They are priced in 6 euro per meter price range.
I don't have much experience in using v-slots, but it is good to know that they are now more available in my part of the world, Europe.
http://ratrig.com/
V-slot product page: http://ratrig.com/hardware/vslot.html
