HELP PLEASE?? Want ta PH Probe Port to Reactor??

[BLANKENSHIP76]

http://www.marinedepot.com/ps_AquariumPage~PageAlias~calcium_reactors_knop.html

I have the KNOP C reactor,

I want to put a compression fitting in it, so I can have a PH controller with the unit.

Can anyone, tell me where to get the pieces for the compression fitting and where to drill the hole in the reactor, etc.........

Thanks in Advance.