AB 802x limit switch; replaceable contacts??

Does anybody know if the contact blocks can be changed out of a AB 802X-A7 limit switch? I've pulled up the AB catalog , but it dosnt say. I've got a tech on a job who want to replace 4 switches due to bad contacts, $$$$$ OUCH!! Im trying to figure out if we just need new contacts or whole new switches??

Thanks...Mike.

Found them....

Sorry for the bother...AB's website is not the easiet to nav. But persistance pays off....

http://www.ab.com/sensors/sensorstoday/pdfs/802_pa001a_us_p.pdf

mike.