I just got mine from covers4auto.com and I have a 2009 SE model. When I was on their website, it's really easy to select which Journey you have and the year it was made, no measurements needed (doesn't matter if you have the SE, R/T, or SXT). I had a very good experience with this website as well. I ordered my seat covers on the 19th of November and received them on December 1st. I ordered the Neosupreme covers for the front and backseat, installed them yesterday and they look fantastic. I paid just a little over $300 and shipping was free (although if you want to ship international, there is a fee).
Ultimately, while it does take a couple weeks to get your custom seat covers, trust me, it is well worth the wait. Good Luck!
Regards,
Eric