btw i got one of those key covers they did fall apart very fast but its because the mold the used for it left some marks where they like feeded the mold if you just trim that down whit a "dremel" (electric handy man tool) or sand paper or a tiny flat screwdriver those will fit better and prolly stay longer together
i did the part whit a flat screw driver you got 50/50 chance else you scrape of the leftovers that are on the key cover or you break the cover if you push to hard on the screw driver
or the best but quite "expensive" solid solution put them together whit some super glue .... but i didnt feel like when my bateries die that i need a screw driver to break the key cover so i can replace the bateries
your choice though but i have to say they make the Gordini more complete =)