Here are two textbooks I found:
http://www.stitz-zeager.com LaTex code are available for download, so we can edit it. This book cannot be used as a MTH112 textbook.
http://www.opentextbookstore.com/precalc/ Microsoft Word versions are available for download, so we can edit it. This book covers both MTH111 and MTH112 topics.
PCC SE Campus Math Instructor