Where can I find the IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines
On the second page of google results I found a question on the arduino forum this had a link to http://ics.nxp.com/support/documents/logic/

The link was dead, presumablly as a result of the NXP/Nexperia split, but the internet archive has a copy

There doesn't seem to be any document whose title precisely matches the referenced "IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines" , however there seem to be a pair of documents containing the relavent information 

IC06 74HC/T High-Speed CMOS Package Information contains a mapping table showing which IC goes with which footprint. 

IC06 74HC/T Package Outline Drawings Package Information has the actual package drawings.