I've got a spare hatch seal I'm keeping, but you can easily find used ones in good shape and it pulls right off and installs easily.. maybe a 10 minute job at most.
Your tail lights gaskets are another deal and you should just order a new set from Jeff/Curt and be done with 'em. Do a search, tehre are many threads about water in the spare wheelwell and what to do to fix.
Good luck!