rather than having to manually type every ticket number, if there was a way to data-merge into InDesign, or some other such script / extension?
Create a numbers file in excel and save as csv or tab delimited, then use indesign windows>utilities>data merge.
InDesign Data merge
Automating Data Handling
"Create a numbers file..."
What is a numbers file Salah? Do you mean a single column list of numbers 1, 2, 3, 4 and so on?
You can also use a blank field with paragraph returns if you set the style with the Bullets and Numbers feature.