Lansdale officials are looking for a suitable way to honor the memory of Former Mayor Mike DiNunzio.   He passed away in retirement earlier this month following a long career that included 26-years as mayor of the borough.   A committee will be formed to come up with a fitting memorial.   Borough Council President Matt West and current Mayor Andy Szekely will serve on the committee but the other members are undetermined at this point.   West says the committee will take its time to make sure the most appropriate way is chosen to remember Mayor Mike.