stussy

Hello. Ive a 300 tdi es N reg 1996 that seems to have more water on the inside than the outside, The load area floor gets wet so much so that the boot floor has a few holes in it ,can these be replaced? and both footwells are wet, the carpet is dry but the black rubber/foam under the carpet is soaking, Has any one got any ideas where to start looking and also how do i replace the boot floor,