The rope binding isn't hard to make, but it is time consuming. I found a couple descriptions on how to do it via Google, which I now can't find again. One of them was on this forum I think, Another on the Han'a Lima forum. It is mostly a matter of slicing, sanding and gluing, then more slicing, sanding and gluing etc, etc. The rosettes are a bit tricky as it is hard to bend such a tight radius without the strips breaking into short segments. I have found they have to be assembled from smaller bits with a bit of trimming, but it is almost un-noticeable once done.
The general response was that it is really uneconomical to make your own if you are serious about making a dollar (or a kroner) out of building ukeuleles or anything else using rope binding and that the sensible thing is to get Michael Gurian to make up a batch. I am planning to make another lot soon and will order some big sheets of white and black fiber from LMI as backings before I start. I will document the process as much as I can and post that here and maybe on my website as well.
Cheers
