We (NI) provide some CAD or engineering drawings of products in the resources section of the particular item. However, if the drawings are not in the resources section, we cannot provide them to you. However, for the PXI modules you have mentioned, these all confrom to standard dimensions, which you should be able to attain. In this case only the connection may vary.
I hope this helps.
That is useful information. If you know of a specific or generic model from that family I'd appreciate it if you can post a link.