MK15 mount replacement for SD25 / WD25 docks

Anyone out there seen the MK15 replacement for the WD25 / SD25 docks? 

Totally different undersides now. 

Just had to replace a failed WD19 for a WD25 and I've been caught out. 

And worried, given 50 WD19 & MK15 mounts in a business.