Tell him to first off all do some of his own research. No need to ask somebody to do the research for him.
Second, big chance his test levels are low enough where one of these new-age, "we breed young men again" clinics will put him on a testosterone replacement that will do wonders with time. He'll also be assured of using real, legal, and clean gear if he goes this route. They might even throw in HGH if he has the money to do so which will really help him transform his body (not necessarily with sheer size, however) over the next 6 months.
Other than that, it sounds like he's already done a cycle so I'm not sure what the issue is. Just use more testosterone, he doesn't need anything else. 500mg/week of a long estered testosterone. Maybe some dbol at 30-50mg a day for the first 5 weeks if he wants to add in something new.