He said: "I'm trying desperately hard but it's not easy on international week."
He added: "I am following up calls I've made to clubs trying to get some players in, it's not just one as I am after two this week.
"At this moment in time we are fully stretched and we need some fresh legs."
The Cobblers are looking to put the FA Cup disappointment behind them and get some points on the board in the League.