Hello welcome to the site. I looked at our breeder reviews. Looks like the closest one that's been reviewed is in Manteca, CA and has a high rating. It's about 6 hours south of Grant's pass. There is also a chinchilla breeders directory but both listings in Oregon no longer exist. There is a listing in Washington that leads to a site that shows they have a mosaic for sale. Whether or not their site is up to date is anybody's guess. I recommend have a look here:
http://www.chinchillaclub.com/breeder/Locating a vet that does exotic animals (specifically chins) nearby is an important step in preparation. Preferably with emergency care service available. When things go wrong with a chinchilla they can go downhill and die in a matter of days depending on what it is. They are somewhat like birds in that way but with more sensitive digestive systems.
I also wish to have a chinchilla as a pet but I do not have a suitable place to keep one. I hope that my circumstances will change soon. I'd rather have a cat (used to have three of them) but my mom is now severely allergic. I do think they make great pets though if properly raised and cared for.
If you have never owned a pet before you really need to consider the fact that caring for chins in not like caring for cats and dogs. They must be kept on a strict diet and temperature controlled environment to survive. To thrive chins must exist in a peaceful environment free of hazards with a fairly consistent routine. Sometimes it's not obvious what those hazards are. If your heart is set on a chinchilla then I recommend you become a member of Chinchilla Club. There are many valuable articles there to browse.