i can confirm 100% (to the chap who posted on the last page) that the roof bars do fit without any mods, and just bolt straight on with no work required on the inside..
i've fitted them on my 100HP, so to summarise; the sales is trying to pull a fast one (what a shock!)
Thanks for the info - I did ask the question orignally in Feb 2008 though.
Said dealer demonstrated similar form when my wife was ordering a new 500 and subsequently lost a sale.