tishtosh

Hey guys, Sorry if this has been covered somewhere already; I did a cursory search but couldn't see anything. I've got a TW125 as my first bike and want a rack to fit the back. I've searched and the only thing I could turn up is some 'tubular topbox rack', at £102! That's far too much, and I'm not even sure it's what I need. I'm just looking for something like this (link), but I'm not sure if it's a standard fitting on the bike, or a specialised fitting. Thanks in advance.