No one that I know of has put the vert seats in a hatch car. Most likely to have it look good you would need an upholstry shop to make you two covers for the fold down part of the Fox hatch seats using the vert material plus some new material. Unless you know someone, my guess is that would be $200-300 or so.
SN95 door panels would need quite a bit of modification to work on the Fox doors. Guys have done it, but unless you used the SN95 dash, I don't know how it would look.
As for the carpet, it has some usually glued to the carpet, but I was able to remove it. I got some water in my car years ago (like 92 or 93) from driving in 6-8" deep water. It didn't come into the car from the doors, but must have seeped in through some opening in the bottom. I didn't even know it was wet until it started to smell! I took the carpet to a washateria that had an industrial size washer & dryer and cleaned it up that way. I flushed out the sewer water from the padding with lots of clean water and was able to dry it in the sun and in my home dryer with several fabric softener sheets. I used it for another 12 yrs until I put in the new carpet. You should be able to remove the padding from the wet carpet and wash the carpet and dry it and it should be OK. Maybe even use a self serv car wash to clean the carpet, I know someone that does that to carpets