Where to buy HP Prime rubber feet?

[umue1]

Hi,

I use my Prime since 2014 for EE, Physics and any kind of normal calculation.
(By the way Prime is the best Calc I ever had (hp28, hp50, TI30, FX81,FX100 etc.))
Lately the Prime lost on of its rubber feet and I could not find
a rubber foot when browsing the web.
If anyone knows a vendor to order this spare part, would be nice to let me know.

Thanks a lot

Uwe/Munich