UA still requires 50K for Europe FF ticket. You would get the miles for your flight, but they are posted after the flight. So unless you get another 20K UA miles before your flights I do not see how you could get your friend a United FF ticket to Europe. Also as pointed by someone else, get the United paid ticket in your name since you have a fair amount of United FF miles, and get a FF ticket for your friend.

Buying FF miles from CO is expensive, consider alternatives like the CO executive pack if you can get one, or maybe a CO affiliated credit card which gives bonus miles for getting the card.