Lens Unlock Button for Pentax K-r

[some_random_photography]

Hello,
I have a Pentax K-r passed down to me by a relative and I realized that the lens unlock button was missing. Is there any place I could go to get a replacement?
Thanks

 

[airconvent]

You can go back to the agent. They will be able to repair for you. Or you can try the Camera Workshop at Peninsula Plaza..