help with panel writing

[ektor_s900]

Hello everyone, I have a PSR-S970, and I have seen that the dark gray or black color as the PSR-S975 that brings the panel of the fingers or sweat, the writing begins to lose, unlike silver keyboards like the PSR-3000, or PSR-S900 or PSR-S910, which did not happen so easily, would have to take a few years. So my question is, isn't there an English panel protector? On eBay I found a paste protector but in Chinese! and also volume protector.
I appreciate your comments and help

https://www.ebay.com/itm/For-Yamaha-PSR-S770-PSR-S970-keyboard-arranger-keyboard-Chinese-panel/283603488534?hash=item420815cf16:g:yVwAAOSwweFdcHI8

https://www.ebay.com/itm/Fur-YAMAHA-PSR-S970-Keyboard-Schutz-Sticker-fur-das-Volumenrad/201685830003?hash=item2ef5698973:g:dxUAAOSwCGVX7Rmd