Extension for Kahrs

[Glock Glockler]

I recently picked up the P40 with the short grip, mostly because it would make such a fine ankle gun. The one thing I want to alter is the grip, I've seen plastic grip-like fillers that allow one to use a Glock 20 mag in a Glock 29, they fill in the gap and allow a more full grip.

Does any such thing exist for the Kahrs?

Thanks