retrofit s line bumper on sportsback

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I have put S line bumper on my sportsback audi.  I have an issue sourcing the right jetwash caps and towing caps that fit.  When I thought i had sourced the correct ones and removed the bumper to connect to jetwash they did not fit.  I am assuming because the jetwash connections on the two bumpers are different.  Does anyone have a work around or know where to source.  I've found a work around for the screenwash but these are the last few bits.  Any help?