dhea converts into test, along with a bunch of other hormones.
4-dhea converts into 4androstendione, which converts into test.
if you look around, you can find 4-androstenediol still being sold from ug labs.
if your going to buy 4-diol, you might as well save some money and just get inject. test.
you can also buy andriol, which is oral testosterone. but you'll have to take a sht load of capsules each day to get enough. then there are the patches, and creams.
inject. test is the easiest way to go, with 4-diol being the next. but finding it could take hours of searching.