Head gasket recommendations in Portland, OR area

Hello, our 2010 Prius with 180,000 has recently shown sighs of the head gasket failure. White smoke out the tail pipe, slight loss of coolant, and engine runs rough on initial start. The car has never consumed coolant before and the total amount lost is the volume to the LOW mark on the reservoir. Since the coolant lost is very recent and there were no signs of overheating, I was thinking a head gasket replacement might be ok to get a few more miles/years out of the car. I contacted a highly rated shop in Portland and they only recommended a swap to a pre-owned Gen 4 engine. Can anyone refer me to an experienced person/shop to replace the head gasket. Thanks.