This link at 0:37 shows an example of a cleat on a tacking Ndrua, not junk rigged (Ontong Java).

https://www.youtube.com/watch?v=ToZdp14sUOU

More on this Ndrua to be seen here:

https://vimeo.com/71203747

Wow, how exciting. I would really like to see some photos of your Drua. How traditional are the hulls of your glass and foam boat? They are very subtle complicated shapes traditionally, assymetrical in both section and waterlines and have a dedicated bow and stern dispute being a shunter. The windward hull is only slightly shorter and they had different names for each hull. I really would like to see how you have dealt with the rudder issue, the traditional sweeps were known to kill helmsmen in heavy weather, but hey, the Fijians didn't take prisoners!

Well, clutches are all very fine and dandy, but they're also expensive.  What's wrong with normal horn cleats, or those with a jamming V at one end of the horn?  For the downhauls, those plastic jamming cleats should do the job, too.  All easy to buy secondhand.

Flying down to the Caribbean on Monday to install my new junk rig on Drua.   Thank you Slieve for your kind help.  It must get frustrating helping newbies with lots of questions.  

I made two 50 Sq M sails in about 30 hours.  I was cutting and one person was sewing with another helper.  I used 9 Oz mustang material and hope it will be stong enough.  

Does anyone have any advice on what I can use as a cleat for the parrels or down hauls? I think I will have three lines on each sail that need to be cleated.