Wish I could tell you I knew about a majic pill, but I don't. Your 60% there actually sounds pretty good.
I am involved in a study on the drug Muse, which in the past was by injection into the penis. The new Muse however is a tiny pill (reallllllly tiny) that is inserted into the urethra. It feels a little strange when being inserted, but not pain.
I have only been going for 4 days, but even at the absolute lowest dose, it causes quite a bit of penis swelling. The only side effects seems to be mild discomfort from the swelling, and a very small percentage of men report burning. I think that once I get used to it, it shows some real promise for a real erection.