ZMA type stuff only raises test in people with a zinc deficiency. I'm suspect of any natural remedies that claim to raise test, as far as I have read, they all seem to be a waste of money. There are a few designer supps that might work, but again, probably only in people who are deficient in some manner. If any of those supplements worked, I doubt people would be put on HRT, doctors would just prescribe tribulus or whatever else to the patient instead.
If you are okay with stuff that might not be completely legal, then there are a few options. Clomid can temporarily raise test levels, but it's only temporary. You can buy it legally from Mexico or Canda and have it legally, as long as you don't try to sell it. (read: don't buy too much, or they will accuse you of intent to sell) But clomid can cause problems in higher doses, such as vision distortion that might not always go away, etc.
If you are okay with stuff that might not be completely legal, then there are a few options. Clomid can temporarily raise test levels, but it's only temporary. You can buy it legally from Mexico or Canda and have it legally, as long as you don't try to sell it. (read: don't buy too much, or they will accuse you of intent to sell) But clomid can cause problems in higher doses, such as vision distortion that might not always go away, etc.