Guy on here and eBay is selling Mpyre mids with the crossover for 100 shipped a pair. He'll do a little better if you want to buy 2. He ships them fast via UPS. He has a thread on here too.
Vifa The 7" woofers are BG18WK03-04 "These drivers share the same motor and cone as their Vifa MG counterparts. They sound very similar, and in fact I couldn't tell the difference"-MiniVanMan. I bought them from him and I think they sound very clear not to much down low but with a nice sub its a great match. One speaker has a very slight tear in the surround, doesn't affect the performance at all.
$45 plus shipping
Thats only 1 pair, don't really know where you would find 4 pairs unless you waited around or ebay