Yeah that's Summit White.
Shouldn't be too hard to find.
The other alternative is this. Walk over to your local GM dealer's body shop and strike up a conversation with the manager. Tell him that you have a few small random parts you want painted but there's no rush, and if he can throw them in next time he's doing a paint job on a vehicle your color, which is very common. This way he doesn't have to load the sprayer just for you, and it actually costs him little to nothing to do the job cause the paint and labor is on someone else's insurance. Most GM body shops don't mind doing this and it ends up costing you a lot less. The only problem with this is that you have to live for a few days without your parts, so it's not always practical.