Low cost WDM gear

I know there are various Asian vendors for low cost (less than $500) muxes to throw 16 or however many colors onto a strand. However, they don't work so well when you don't control the optics used on both sides (therefore must use standard wavelengths), obviously only do a handful of channels and have a distance limitation. What solutions are out there that don't cost an arm and a leg? ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com