Funnily enough, minutes after posting the above update, the developer got back to me.
He has asked me to personally fund any work that would be required to get this tool to work with DOpus. I would be happy to pay to have this feature, as it would come in very handy for me as a draftsman. But it's hard to know exactly how much time it would take to add DOpus compatibility to his program, and how much it would cost.
At this stage I'm not sure how I should proceed, I will post on a few CAD forums to see if anyone other DOpus users would be interested in sharing the financial-load to have this tool developed.
Is there anything that can be done from the DOpus development team to investigate this? Are there any DOpus add-on developers that would be able and interested in exploring this further? Of course I have no intention of ripping off the developer of the original program (JTB - they are a well respected developer of AutoCAD tools). Just wondering how difficult it may be to get the two programs to talk to one another, or even an alternative option.
Thanks for any help.