Thankfully, however, your nodules are benign, and therefore are not of any urgent concern for you. It's doubtful they will be long term, either.
The only other things I can possibly think of that might be of some help is potassium iodide, although most multis contain 100% RDA of that. Use caution with any allergies to the iodine, of course.
The other is zinc. In the popular "Prescription for Natural Healing," the author mentions that zinc alone basically has the ability to rebuild the thymus gland. Zinc is also big in the immunity department, so that might always be worth a shot, so long as you're aware of its ability to lower the copper level.