Austin sprained an ankle during the home defeat to Aldershot on November 23 and has still not made a full recovery.
He is expected to remain sidelined along with fellow defender Richard Jackson, who has been a long-term absentee.
Those two aside, boss Paul Peschisolido has an otherwise full squad to choose from. He may also boost numbers with the signing of experienced midfielder Bryan Hughes.
The 34-year-old former Wrexham, Birmingham, Charlton and Hull player is training with Albion and Peschisolido is keen to sign the free agent.
Source: PA
Source: PA