if you want theres also the ghetto route that I tried based upon this thread
zerothread/320490. Credit goes to stangalot.
Ended up costing me about 50 bucks in the end, but i didnt have a hot glue gun and i messed up the velcro and plastic on the first try.
Heres what you'll need
-20 ft. industrial strength velco (wal-mart for $20ish) they sell 8ish feet for $10 as well, you'll need a little more then just 20 ft. if i recall correctly.
-heaviest duty vinyl you can find, wal-marts is only 20 gauge but has worked for me so far...
-hot glue gun and a crap ton of hot glue
-(other thread used liquid nails) some kind of vinyl glue
but yeah it basically goes,
1. cut out old window but leave part sewn into fabric (helps maintain factory seal)2. place hard and sharper side of velcro with hot glue on adhesive to inside of window frame3. let dry for a tiny bit, then place connect velcro to each other4. cut out pattern for vinyl5. place vinyl while using more hot glue to connect it to adhesive side of soft side of velcro6. use vinyl glue in between old window and new one to create seal
and tada you have a ghetto fabulous back window that looks passable and keeps out rain (it'll leak a tiny bit in car wash pressure washer, but not too bad)
I'll post some pics of mine, there are a few more pics in that thread as well. If I had the money i'd go the professional route, but i'm pretty strapped for cash still being in college and all and the $50 window should last until I have a real job and can get a new back window.