Reddit mentions of Sigma 884109 F2.8-4 Contemporary DC Macro OS HSM 17-70mm Fixed Lens for Pentax KAF Cameras

There are a few out there - primarily third party lenses like Sigma....

• http://www.pentaxforums.com/forums/10-pentax-slr-lens-discussion/272123-k-mount-lenses-image-stabilization.html
  
  
• http://www.pentaxforums.com/forums/58-troubleshooting-beginner-help/156526-lenses-image-stabilization.html
  
  It might be difficut to fid one new - since they stopped making them, but you should find one ued.
  
  
• https://www.amazon.com/Sigma-17-70mm-F2-8-4-Contemporary-Pentax/dp/B00AXZZ0XY/ref=sr_1_1?s=photo&ie=UTF8&qid=1473751829&sr=1-1&keywords=Sigma+17-70mm+f%2F2.8-4+DC+Macro+OS+HSM+Lens+for+pentax
  
  
• https://www.amazon.com/gp/offer-listing/B002ZNJB3M/ref=dp_olp_used?ie=UTF8&condition=used
  
  
• https://www.amazon.com/gp/offer-listing/B00AXZZ0XY/ref=sr_1_1_olp?s=photo&ie=UTF8&qid=1473751829&sr=1-1&keywords=Sigma+17-70mm+f%2F2.8-4+DC+Macro+OS+HSM+Lens+for+pentax&condition=used
  
  You need to make sure about 2 things. 1) it's for Pentax (the K mount) and 2) it has OS in its name for Optical Stabilization. You can probably make a "wanted" in the marketplace area over in at the PentaxForums.com
  
  
• http://www.pentaxforums.com/forums/