Popping this thread, I just emailed with Jessem - they are going to produce a metric version of this. Not sure if Woodpeckers product prodded them or what - but I think the Jessem one is preferred and will be ordering one (or two).
Awesome, I was seeking an answer to exactly this, should I wait for the metric Jessem or get the new Woodpecker one-time marking gauge. Thanks heaps for posting!