I found that there is a cardiology and eye clinic at the Western Washington dog shows in Puyallup WA in January: Go to page 15 of the following link:
https://www.barayevents.com/docs/838/document_3151.pdf
The good news is that it gives your pup a few weeks to maybe outgrow the murmur, if that is going to happen. It certainly could be an innocent flow murmur: it happens in kids and puppies, too!
The clinics are first come, first serve. Bring records and cash, usually, as well as your dog's registration number and any microchip information. The fees are usually lower than at the office of the cardiologist, but I am not familiar with prices in your area.
HEALTH TESTING CLINICS FIRST COME, FIRST SERVE ONLY ON ALL CLINICS
Heidi N. MacLean, DVM, MS, DACVIM (Cardiology) Pacific Veterinary Cardiology, LLC
Genetic Heart Screening/CERF exams – $35.00 per dog
($30.00 for Dr. plus $5.00 per dog for building rent)
Echocardiograms – $265.00 per dog
($260 for Dr. plus $5.00 per dog for building rent)