I'm so happy I solved this, and that quite rapidly. Usually, I'm really terribly bad at holes boards. I even had fun at searching for the solution... :D
Just like JeffB and yokosooo I had a 73, first. Then found a 69 and a 67 and am still stuck 2 off. Will keep trying. It's a hot-burger. ;) :))
EDIT (6 days later): Finally found the 65. Very nice find, FlashBack.