Factory top box/side case mounting bracket question

What does the factory top box and side case mounting bracket look like for the 1983 Seca 750 model? I bought a bike with factory faring and three piece luggage set but the previous owner said the plastic mounting bracket broke.

I did not realize what he meant until I tried to remount the cases and discovered that I am missing something major in the way of the bracket.

The side cases and top case have nothing at all to attach to and I don't even know what the bracket looks like.

Also, how hard is it to find a replacement, whether OEM plastic or aftermarket metal equivalent?

If anyone has a photo of what the bracket looks like on their bike I would appreciate it.

 

You might want to repost with a more accurate description, something like XJ750 Seca mounting bracket pic needed, or some such ... that way the target audience will be more likely to read.

 

http://xjbikes.com/Forums/viewtopic/t=17161.html