Thanks for the reply on the mast-list.
North does have a Gold and Platinum RDM. I've also found a x-combat with an rdm indication on ebay.
But never the less, I just ordered a new CAAS mast. It is a 'cheap' powerex like mast, build in Slowenia or something. Cheap is 249 euro. (www.zuidwest6.nl
Now all I need is an extender and wind!!