Am looking for a part for a Peugeot Performance c1998 which is a new acquisition for my husband. It is the mounting sleeve for a campagnolo veloxe 8spd rear derailleur. I don't have both parts of the broken one I have but have found a picture on here of the same part .. shown below
Where would be a good place to look for this. Am totally new to road bikes. Am also looking for the decals for this model but have had no luck googling so any pointers on that would be great as well.