Cambridge Audio makes a streamer that hooks up to your system as a source component. Has lots of digital/analog inputs. V2 is not what I would call "cheap", but I have the V1 of this model that could probably be found for good prices used.
https://www.cambridgeaudio.com/usa/en/products/hi-fi/cx-series-2/cxn
https://www.cambridgeaudio.com/usa/en/products/hi-fi/cx-series-2/cxn