Pledge Card Creation, Thank You Letter Processing and Bill Card Reminders

All, 


We are currently migrating to NXT and we have some custom Visual Basic Coding systems that were created by our internal IT team that are no longer going to be able to work when we migrate. 


HOW do you all handle the creation of bill card reminder, thank you letters and pledge creation if you have specifics that are needed (gift arrays, scanlines,etc) that need to be pulled from RE NXT and sent to a mail house for printing and sending out?