Stand away form the keyboard. I've not seen one of thee come up on here and only once recently on e-bay. Me aka now has a makeshift plastic Ritchey thing (deep recessed one) in that actual worked easy and very well to tighten it down with no fuss. Apart from the hap at the top and bottom it works fin and doesn't look to bad... from a distance
At least I think it's Ritchey somebody sent me it, looks a bit like this
Yep, that's mine. I did once buy a 1.125 stem and they supplied a 1.0 top cap. It did work quite well as the walls of the stem are very thick so it didn't slip down.