3 axis cnc/router bed

[dudz]

My table on my "3 axis cnc/router" is a vacuum table, but the x axis is a moving axis, so I would assume it is difficult to use a pump with lines across the rails. Where can I get a "bolt on" replacement bed the same size with pre-drilled clamp holes ? The bed measures 450x300mm. / Or would it be a better idea to buy a vacuum pump ? but these seem very expensive. I plan to mill alu, cut plastic and carbon fiber.