These are the available user exits..
CCOWB001 Customer exit for modifying menu entries
COIB0001 Customer Exit for As-Built Assignment Tool
COZF0001 Change purchase req. for externally processed operation
COZF0002 Change purchase req. for externally procured component
PPCO0001 Application development: PP orders
PPCO0002 Check exit for setting delete mark / deletion indicator
PPCO0003 Check exit for order changes from sales order
PPCO0004 Sort and processing exit: Mass processing orders
PPCO0005 Storage location/backflushing when order is created
PPCO0006 Enhancement to specify defaults for fields in order header
PPCO0007 Exit when saving production order
PPCO0008 Enhancement in the adding and changing of components
PPCO0009 Enhancement in goods movements for prod. process order
PPCO0010 Enhancement in make-to-order production - Unit of measure
PPCO0012 Production Order: Display/Change Order Header Data
PPCO0013 Change priorities of selection crit. for batch determination
PPCO0015 Additional check for document links from BOMs
PPCO0016 Additional check for document links from master data
PPCO0017 Additional check for online processing of document links
PPCO0018 Check for changes to production order header
PPCO0019 Checks for changes to order operations
PPCO0021 Release Control for Automatic Batch Determination
PPCO0022 Determination of Production Memo
PPCO0023 Checks Changes to Order Components
STATTEXT Modification exit for formatting status text lines
Check the code posted by me in the link below ,to get the list of User exits and Badi for a particular tcode .
Very useful program .
Hope it helps.