Upgrading Kef R100 crossovers

I just picked up some R100’s and am really liking them.  I think that I like them enough to try to squeeze every ounce of performance out of them and am thinking about upgrading ghe crossovers.  There are only a few components so I don’t think that it would cost too much $.  I am not handy with a soldering iron so I’d rather just send the crossover schdmatics to someone and have them send me back complete, new crossovers that I could just plug and play.  

Where / who could do this for me?

And while I am at it, would replacing the batting inside with some no rez be an improvement too?

Thanks ahead of time for any info on this!!