I haven't been in that area in years. I went to the Deschutes river below Bend a few times with my step-dad in the mid 70's. There are a few fly/tackle shops in the area that may be helpful.
This is a local outfitter: http://www.riverborneoutfitters.com/
This is a local fly shop: https://www.sunriverflyshop.com/
Good luck. Jim