Metra VXT52 Car Speakers foam protective housing (round-flat / 13cm / pair) 4047442065200 | eBay
Amazon.com: BOSS Audio Systems P45.4C Phantom Series 4 Inch Car Stereo Door Speakers - 250 Watts (Pair), 4 Way, Full Range, Tweeters, Coaxial, Sold in Pairs, Hook Up to Amplifier : Electronics