Try these guys. I beleive they have 2 pair in stock because they ordered them for one of my customers back in Jan. Customer got tired of waiting and canceled order with me, but I am about 99% sure they still have them.
Follow these instructions for the distributor side of DAS , which is called Auto Sound Distribution.
Call this number (757) 431-1210 ask for Aaron. When Aaron gets on the phone, tell him: "Bill from Audio Connection refered me to you. He said you may have a pair of MB Quart marine speakers in stock."
Then tell him what models you want.
If he is out ask if he can get them.
Hope this helps.