I'm not sure I would put much faith in the gift set idea when it comes to third party releases. I can't think of any example of toys that were already available being repackaged as a gift set without some sort of repaint.

Most third parties have shown themselves to be pretty good at making enough product to fulfill demand, and re-releasing product as necessary, therefore I find it difficult to believe they would go to the trouble of re-releasing an existing product as a set. I think it more likely they would do a package deal if they have excess stock.