Dane McDonald has been ruled out for the rest of the year, while Richie Barnett (foot) is also struggling.
Aston, whose side won 32-30 at Featherstone last week, said: “We were down to 18 or 19 fit players before the game at Featherstone last weekend but I’m hoping quite a few quality players will be back.”
He added: “We have hit a decent run of form and this is the right time to be playing well.”
The powerful prop underwent minor knee surgery last month and could be recalled to the Halifax squad.
But Rob Worrincy faces a fitness test after limping out of last week’s 30-16 win against Widnes.