Marinus,
My Paso was already fitted with replacement straight-through Conti silencers in chrome when I bought her. They looked superb and sounded even more so...! Not objectionably loud, but much deeper and more pleasing tone than the standard black "mufflers".
I've never seen another Paso with the Conti's fitted; none of the bikes in the gallery appear to have them either.
When I have a few moments spare, I'll post some pictures on the gallery. - Can anybody give some hints on how to do that? I found the tips on putting an image into a post but couldn't find the info "in the FAQ" which was mentioned.
Also, redmidget, I had my seat recovered by a local coachbuilder and upholsterer. I gave him a picture of a Corbin seat from the internet and he replicated it for me, having a black cover at the front for the rider's part, and a red cover for the pillion part, delineated by a tasteful white rolled pinstripe. See the 907ie gallery, 000115 and 000011, for a similar-looking seat cover.
These colours made the bike look even more classy, with a slight "single-seater" look about it. But maybe you just want to return yours to the standard colour?
Also, being 6'-2" tall, I found the standard seat pushed me too far forward into the cockpit, so I had about 2" of the foam cut out from the front of the "bum-stop" before it was recovered. This made the riding position far more comfortable.
Cheers!
Dave.