You can add an outboard streamer. If you want it built in take a look at the R-N602? It looks like it is the same as the 803 with 80 watts instead of 100 watts!!
https://www.crutchfield.com/p_022RN602/Yamaha-R-N602.html
https://www.crutchfield.com/p_022RN602/Yamaha-R-N602.html