I have a 2001 Ford Ranger XLT 4x2 3.0 automatic 2 door and 2 half doors that open behind front seats of cab. There are two speakers in each of the front main doors and one each in the two half doors. I just installed a Boss touchscreen DVD/CD stereo receiver w/bluetooth and want to upgrade the original speakers. I don't have a book to the truck since I inherited it and am only the second owner of truck. I'm trying to find out if anyone by any chance know the size of the speakers so I can order some. Please help.