(not mine)
Came across this while browsing CL and thought someone missing one or doing a restoration may be interested. Look to be in fairly good shape.
YAMAHA RD350 R5 SIDE COVER - $75
https://sacramento.craigslist.org/mpo/d/sacramento-yamaha-rd350-r5-side-cover/7626210857.html
YamR5_sidecov_1.jpg
YamR5_sidecov_2.jpg