Try ebay: interslice, they have a good kit, start with ebay # 120442942190 and ask the seller if he has a special kit for your EM.
He has a lot more kits, but not everything is listed on ebay.
I got the big universal kit from him, have several camera's and backs to do, and it comes with a special tool to ease the job, so you can do it your self.
Be shure to clean all the old gue first, I use acetone and Q-tips for it and then replace the seals.
Becarefull: the acetone attacs plastik's.