Here is a picture of my Craven rack that I fitted (I hope). Not stylish at all, but nevertheless harking back to the 1970s and so in keeping with the look of that era.
I have decided for now to leave it on as it comes in quite useful. I believe though that there is a shorter version in height than the one that I've got, which would be preferable as it drops the rack lower towards the frame loop. I have some support bars that I fit between the rearmost mounting on the rack and the pillion footrests if I am carrying anything with substantial weight.
RGM Motors sell them.
I understand that these are not available any longer from RGM, but you would be wise to check if you fancied buying one as that may no longer be the case.