836 comes up as a pan bracket for the sheild.
CSR #836 is the BB 727 carbon-fiber shield, since I have one in the box waiting to replace my expired shield when I put the engine back in.
That model was hard to find when I ordered mine, too (last year?). I was able to get one from CRT, and at that time I think John said it was the last one he had in stock. Nobody else had one and even CSR was unable to tell me when they expected to have more at that point. Very frustrating...