You are refering to #13 ?SPRING 46 63 1 455 071
K75RT battery cover.
That's works for the rest of the K75 models with standard height seats but the RT cover is special. K75RT battery cover.K75 T, C, and S model battery cover for motos with standard height seats.
The OP did write "WTB K75 (not RT) ..."
Motobins and Motorworks has them listed as in stock.Regards Martin.