Again, thank you all for your comments.
In my own case, I've been meditating for a really long time now. However, I have thoroughly enjoyed and benefited from the detailed Mahamudra meditation teachings--especially vipashyana. (That goes for Dzogchen teachings to.) As I've said, I have especially enjoyed the meditation manual commentaries by Thrangu Rinpoche. For example, reading side-by-side Clarifying the Natural State (Tashi Namgyal) + Crystal Clear (Thrangu commentary) was very productive. I was hoping to do the same with Wangchuk Dorje's texts.
In my reading, reference to the three main meditation texts by the 9th Karmapa kept turning up. Of the three (Pointing out the Dharmakaya, Eliminating the Ignorance of Darkness, and The Ocean of Definitive Meaning), it turns out that Eliminating the Ignorance of Darkness is available in print. The other two are of course restricted. It's an odd situation with those three texts. There are written commentaries available for the restricted texts, but no commentaries available (that I can find) for the unrestricted text! I found a 7 DVD set (for 104 USD) of Thrangu Rinpoche's commentary on Eliminating but no available transcription. Yet, there are plenty of commentaries for the restricted texts. (In addition to Thrangu Rinpoche's commentary on The Ocean, I also liked Traleg Kyabgon's commentary.) Go figure.
At least I'm starting to get a handle on the restricted text issue and how next to proceed. Personally, I have no problem with restricted texts. I come from a tradition that also has restricted teachings and meditation methods.
Moving on to the issue of teachers. Some other folks I talked with have also suggested Tulku Urgyen's sons. I'm considering this. My first introduction to Tibetan Buddhism was Tulku Urgyen's works. I felt a strong connection with him and his lucid teachings. Unfortunately, he has long since passed on. I've tried reading his sons' works. They are good, but don't grab me like Tulku Urgyen's works. Still, I'm open to possibilities. Tsoknyi is currently on a book tour in the US promoting his new book. In mid-June he will be visiting a bookstore about 4 hours from where I live. So, my plan is to drive up and see him. I would like to see Chokyi Nyima but am not sure how to go about that. I am open to suggestions of other teachers. Don't hesitate to PM me if you think it would be useful. (Thanks Silent Bob, your PM is much appreciated and I will respond soon.)
All things are unworthy of clinging to (sabbe dhammā nâla abhinivesāyā). --Shakyamuni Buddha
If there is clinging, you do not have the view. --Drakpa Gyaltsen