Rubber Buffers for GIVI top case mounting plate
If you're referring to the 4 rubber buffers with tapered plug ends which are inserted into holes on the mounting plate for the GIVI top case, I discovered that several of mine pulled out of their mounting holes in the process of removing the top case. It appears that the buffers adhere ("stick") to the case bottom (from prolonged compression contact with the case) and come out of their holes with the case during it's removal. I immediately noticed them laying on the ground next to the bike.
I contacted my dealer who had several left in stock that were in a opened GIVI parts bag marked as "Rubber Buffers (set of 4) GIVI". The bar code on the bag had the part number "Z128" and it was dated 11/17/04. The price was shown as $2.50 for the original set of four. Apparently, he had ordered these from GIVI at one time. Hope this helps in your search.