Town officials are seeking candidates to replace Alene Reich on the five-member Planning Board on an interim basis, serving until the annual election in April. Those interested should contact Town Administrator Robert Pontbriand at 1 Main St., Ayer, MA 01432, or e-mail him at ta@ayer.ma.us. Reich, who also stepped down from the town’s Community Preservation Committee and Historical Commission, has not said publicly why she resigned from all three positions on Dec. 28.