Well, there are plenty of solutions for him, all he has to do is ask. But it will involve going to a urologist. It seems to me that his next step is injections. If you read the testimonials on here, you will probably see that they are not a big deal and work very well.
This is a prostate Cancer support group, but you may get some answers. There are also tons of ED boards out there that can help as well.
This is a frustrating situation so I understand what brought you here. good luck.