vstroman,
If you want options if the Givi mounts don't work out

I recently contacted Shad to see if the 38x expandable panniers on my '22 650 will go on an 800RE , they said they will with a bike specific 3p mount ,around £140. I do like the clean lines without the panniers on , of the Shad 3p mounts.

Hard to find pics of the RE , they all show DEs

but found this ...