IPG’s Hill, Holliday, Connors, Cosmopulos last week finalized a deal to acquire Erwin- Penland in Greenville, S.C., following two years of on-again, off-again talks. Terms were undisclosed. E-P has a staff of 125 and claims billings of $92 million. Like Hill, Holliday, the shop has regional Verizon Wireless business. E-P will keep its name and management team for now, the agencies said.