The another company 727 Captain Liveries are:

727-100 - Highly Detailed Exterior Models are available in the following 8 variations:

   ATA (British Airways)
   South Africa
   United
   US Air
   UDF – Boeing
   Eastern
   another company Pan Am
   TWA

727-200 - Highly Detailed Exterior Models are available in the following 7 variations:

   another company Northwest
   Lufthansa
   Ansett Australia
   Delta
   Braniff
   Air France
   Air Canada


727 Freighter - Highly Detailed Exterior Models are available in the following 2 variations:

   727-100F DHL
   727-200F Cougar

I got that list of liveries from Just Flight 727 Captain Further product information page. The ones that you say are missing are not listed, soI guess you miss out on some liveries by not purchasing the download version from the Captain Sim online store (or one of it's Partners & Affiliates).

Mark