Abcam products would be suitable choice for you.

Anti-Cathepsin K antibody (ab19027) (Mouse, rat, human, ZF reactivity)

http://www.abcam.com/cathepsin-k-antibody-ab19027.html

and

Anti-Cathepsin K antibody [3F9] (ab37259) (Human)

http://www.abcam.com/cathepsin-k-antibody-3f9-ab37259.html

You can find and compare other similar products here:

http://www.biocompare.com/Search-Antibodies/?search=Cathepsin%20K&said=1&soids=269741

Hello, I searched for you at Creative Diagnostics, who provides several anti-cathepsin k for IHC-P study:

https://www.creative-diagnostics.com/Anti-CTSK-MAb-160926-144.htm

https://www.creative-diagnostics.com/Anti-CTSK-MAb-168345-144.htm

https://www.creative-diagnostics.com/Anti-CTSK-PAb-204435-147.htm

Dear Dimitar Parvanov, dear Langyue Hu

Thank you for your input. I know these companies and their anti-cathepsin k antibodies as well as these search platforms. I was more thinking about personal experience, i.e. what is your own experience with such antibodies and tissues.

Kind regards,

Dieter