We don't have the part number for cusotmers. Because many LCD modules can be used on i.MX6ULL processor.
BUT my suggestion is that you can contact a LCD provider, and ask him to
selcet a type of LCD module, your requirments can be like this:
1. RGB666 parallel interface.
2. 800x600 , or 640x480 resolution
The camera for iMX6ULL can be the next: