Originally Posted by Bucky Badger
Sounds like they only sprayed a texture primer on the walls. Mabety you could try to go to a local paint store and see what the bigger drywall companies use....It's worth a try.
That's going to probably lead you nowhere.
Your best bet would be to paint everything, but if that is not part of your plan, I would go to the place you are going to purchase the paint from and bring them a sample( maybe even a piece of the drywall), or ask for a fandeck to take and match it up at your house.
And as far as paint goes, you can head to one of the seemingly dreaded 'Big Box' stores and find a lower quality paint for around $10-$15 per gallon, which is perfect for the project you are working on.
Hope I could help and, Good luck!