Shaun, save a copy as a PDF of each document, combine them in Acrobat or give the printer two separate PDFs, naming them as appropriate (Inside, Outside, that sort of thing). There is no need to move the design into InDesign.
Thanks. What would be the optimum illustrator PDF setting for my printer? Thanks again.
Most printers would not be asking you for an InDesign file, seems to be a misunderstanding somewhere. Did they not upgrade their illustrator liscence?
Anyhow. Place your ilustrator document into InDesign. As long as PDF compatibility is on, you can palce the .ai file.
By default PDF compatiblity is on for Illustrataor files, unless someone did a save as and turned pdf compatibility off during the 2nd final window that comes up.
If your printer "needs" an ID file, find another one. Any printshop should be able to handle a PDF-X/3 file complemented with some instructions and you can perfectly produce those from AI.
Although it is true, you can deliver a PDF, there is a way to get a PDF natively into InDeisgn. Here is a a how-to video on a product I represent called PDF2DTP for InDeisgn. In this case, it can also be used to convert an Illustrator artwork file into a brand-new InDeisgn layout, with active fonts, vector obects and everything converted over:
Maybe that will assist.