Pricha why not have the original woofers refoamed or even reconed? The surrounds can be economically replaced alone, provided that the cones are still in decent shape, or the whole voicecoil/spider cone/surround can be replaced in the original baskets. Contact Bob at Van L Speakerworks:
http://www.vanlspeakerworks.com/
http://www.vanlspeakerworks.com/