Everton brought in Thierno Barry to play alongside Beto, but they're yet to catch fire this season.
Moyes said, "It is difficult to buy strikers. Name the strikers who you can get, I can say that to you.
"You think you will come up with someone. But I will tell you why I wouldn't be able to get them, or why they wouldn't want to come here.
"Age or money or something, there would be a reason. Behind the scenes we are not stupid, we try to get what we think we can. Strikers, honestly, for years at West Ham I could not find one.
"We got one every year, Gianluca (Scamacca) found it really tough and he was Italy's No 9. But the three we have playing the way we are, we would have taken that. We cannot fix it all in one window. We probably were not attractive to do that either.
"I hope we can find goals from Thierno and get some from Beto, the other boys are creative."