The defender, who spent time on loan at Victoria Park, begins a four-match ban after being shown his second red card of the season in the 4-0 defeat to Carlisle.
On-loan goalkeeper Luke Daniels' place in the side could be under threat after the rout in Cumbria, with Mike Green a possible replacement.
Penney has no other injury or suspension problems ahead of the npower League One clash and expects to bring in at least one new face to the club in time for the game.
He said: "My first priority has always been defenders as I like to build from the back, but I would like to bring in a defender, a midfielder and a striker."
Source: PA
Source: PA