There are three towns around Puget Sound, west of Seattle that might be the ones on your Mondia's dealer sticker: Silverdale, Bremerton and Winslow. Winslow is no more than a village, really, on Bainbridge Island. The other two are on the Olympic Peninsula. They are within 20 miles of each other.
If you can track down a period-correct phone directory, check the yellow pages for bike shops with multiple locations.
Or maybe Bob Freeman or Jeff Groman have the answer, both in the biz and nearby.
Dave (grew up near Seattle) Ross
Portola Valley, CA