I'm mil, I haven't found any special training, other than the minimal training I get as a part of my job.
And I do go to as many training courses as I can afford, instructor or not, but I am still wanting to expand my instructor certs if possible.
I support you and others 110% that are willing to invest in their professional development, especially those in armed professions, been there and tens of thousands of dollars later, still doing it. I don't know Zippz on a personal level, but I do know that as of recent he has been traveling this path of professional development and spending a lot of money on it. He can perhaps offer you advice on how he used funds for education, that may apply to you one day. I am empathetic to your situation, so please don't take any of my comments as that of being dissenting or trying to dissuade you, but instead informing you of the availability or lack of availability and challenges here in Hawaii.
The LE/Mil courses here are not easy to get involved with. Most are sponsored and hosted by Law Enforcement, and any extra slots may be offered to select Mil personnel. However, those slots are generally reserved for those with an MOS in that area, or with contacts with the correct people hosting such courses. Of course, select Mil units may bring in training, but you know how that works. Indeed it can be frustrating, but that is how it would work anywhere, not just in Hawaii.
As for "open enrollment" courses to obtain certifications or certificates of attendance/completion, they are far, and few between and as Zippz mentioned there might be a random course here and there, such as the Maui course if it happens, but that is not the norm, but rather the exception. Open enrollment is pretty much non-existent, so clubs are often the way to go, but if you are working on resume development, that is not always helpful.
There are private events in Hawaii that may include instructor level stuff, but these opportunities are hard to come by. Some of the biggest names in the business have done events in Hawaii, but getting an invitation is near impossible.
I am not sure what your budget is, but opportunities for high-quality training are far and few between in Hawaii. Most people, especially in Hawaii just don't realize what it costs to get vetted professional level training from world-class level trainers, unless if they have sought it out elsewhere. So comparing prices here is nominal as opposed to traveling expense and the courses here have a commensurate or even cheaper tuition than mainland courses. Also if you find the right people, the training can be world class. I suggest that anyone who ever has the chance to get involved should immediately jump on it.