"We're looking to get another couple through the door if possible," Cowan said as reported by the Shropshire Star.
"That might be from the trialists or it might be externally.
"We're looking to try to bring in the best we possibly can, but our finances are where they are.
"They have been cut a little, not as much as what I expected, but for whatever financial struggles we have and where our budget won't be as good as many, it's credit to the players.
"The rumours are we have got money because of the players we've brought in and there's no bigger compliment.
"The players deserve the credit for coming in and not for extortionate amounts. That means there's no excuse. It's the players we wanted in.
"If we can add one or two I'll be very happy."