Hooper was Celtic's top scorer last season with 31 goals in all competitions, meaning his departure to Carrow Road has left Lennon with a big hole to fill ahead of the transfer window deadline.
|80/1||Gary Hooper is 80/1 with bet365 to be the Premier League's top scorer
However, the Northern Irishman is still looking for another forward to come in at Celtic Park.
"We are looking to add to that area, we've lost our leading goalscorer for the last three seasons," he told Sky Sports.
"Stokes is a very under-rated striker, he's worth his weight in gold. If you look at the assists he has as well it's very impressive.
"[We need someone who can] lead the line, hold play up, bring people in, but ultimately score the goals that really matter, somebody who has a real weight of goals.
"We have been notorious over the years for having good strikers so we're trying to find another one."