Hm, i I see a couple there...as well as other sites but they all involve slime. Might have to save up my funds- I guess this is another specific request!
There are some scenes of couples kissing while getting pied or all dirty of pie in the Nutty Nut video on "The largest pie fight every filmed" topic... if that's what you were looking for...
I have dozens at www.excessivemess.com check in particular Pussy cream pies and ass cream pies series as well as any 2 or more girl scenes. I include pics in the descriptions as well.