I don't think it's related to repertoire.

Here's where I first saw it:

"Incan diviners and augurs also had no previous clue to the impending invasion, despite their repoire with the spirit world."

And here are the top hits from a Google search for "repoire":

"...quickly make new friends and develop a repoire with their teachers..."

"We had so many pleasant sensations between us, a fine repoire, yet I felt a bit crazed unknowing whether or not if this repoire is real, or a phantom of what I want to be real."

"I decided we had enough of a repoire to give out my phone number..."

"You feel a bondedness to them, a connectedness, you feel a sense of repoire."

Something of a mixed bag, as you can see, but it seems clear that the sense is the same as "rapport."

Possibly useful sidenote: I didn't get any hits for "repiore."

Another interesting side note: repoire is number 41 the "Top 1000 Not Found" list at http://www.dict.org, with the same number of attempted searches as "recieve."

And, paulb, I rushed right over to post this after trying to find "repoire" in many online dictionaries and doing several extensive web searches. I'm supposed to be revising a paper, you see. . .