Where can you find to 15 inch cerwin vega woofer for a good prices?

I have two 15" Cerwin Vega Woofers -- they have heavy red rubber roll surrounds, die cast alloy baskets, rated at 400watts each and 4ohm impedance.

They have massive magnets and were bought from a retailer who removed them from a demonstration pair that had damaged (scratched) cabinets, they have been boxed and stored in my spare bedroom since purchased and are a matched pair.