Its a $1 rebuy. I can't see how you would ever play that any different in a $1 rebuy.

Might be different if we discuss the hand as though it was at a $50+ tournament. Still be tough to fold though unless he has Axd with 35 or 3566 or something and doesnt fear diamond/board pairing. Anyone who doesnt push turn there with a baer straight is probably also going to play a lower set all in on river. Could be a possible bluffed flush draw also. Think you are ahead of his range.

Disclaimer I have only ever played about 5k hands in PLO.