1 - Uhlenbrock makes a Loconet adapter for the 6021, making it possible to attach a Uhlenbrock Daisy handheld;

2 - Uhlenbrock makes a Mobile Station adapter for the 6021, making it possible to attach a Mobile Station;

3 - ESU had the Mobile Control 51100 that was directly attached to the 6021. You should be able to get one from ebay.

Thanks for the good ideas.
Have not seen Uhlenbrock in New Zealand. Can anyone tell me the part number for the mobile station adaptor (as their Web pages are not in English)?
John - could you elaborate on what you mean when you say cut the cable in half?
Thanks, Maurice.

Mobile station adapter (it needs the below 6021 adapter):

http://www.uhlenbrock.com/3/4/0/6/I19A64C3-001.htm!ArcEntryInfo=0007.1.I19A64C3&NewServerName=DAVID-IHS
Art.-Nr: 63810 mobile station Adapter

6021 adapter:

http://www.uhlenbrock.com/3/4/0/6/I1AED9E1-001.htm!ArcEntryInfo=0007.2.I1AED9E1&NewServerName=DAVID-IHS
Art.-Nr. 63 820 Adapter only
Art.-Nr. 64 820 Set Adapter + IRIS IR remote

Maurice, as John suggests, where are you in NZ? There are Marklin clubs in Auckland, Wellington, Chrischurch and the Manawatu, and any of these clubs can help/show you what to do.

As far as the connectors go, they don't have to be the same as what the 6021 uses, they just need to be capable of being installed on a ribbon cable with the correct number of pins, so that you can insert an extension piece into the Marklin cable. You should be able to get cable and connectors from any Dick Smith or Jaycar outlets. The guys at Jaycar could probably help you out, as they tend to be more electronics enthusiast types than the DSE people.

The connectors are usually crimped on to the cable, after correctly lining up the cable with the pins. You would need 2 sets of male/female connectors, plus whatever length of cable.