Does anyone know where I can get a shih tzu for my wife?

I’d like to get a shih tzu puppy but if I google I may be at risk of purchasing one from a backyard breeder, genetic health issues from inbreeding etc.

My wife loves her shih tzus. I got her one through a dog groomer because an elderly lady said she couldn’t care for her anymore and that shih tzu had a puppy . She was always with my wife and really sweet but was sick though since she was little and suffered from seizures and had to be on medications. She was the runt and stayed small actually. She then one day had a seizure and passed away in my wife’s lap on the way to the vet. She still misses having her companion. As a surprise, I wanted to get her a shih tzu pup.

Enough time has passed in my opinion. She will always miss her I know but is there any reputable place that sells shih tzu puppies from a responsible breeder? If affordable prices that’s good too. If the good places are expensive then I’ll just keep trying to save.

Thank you for your time!