I've had a few important aircraft parts chromed, and its been my experience that as long as you specify in the order you want the parts baked, they'll usually do it at no additional charge.
Any reputable plating shop should have the capacity to bake parts, otherwise I wouldn't bother with them.
The oven gives the chrome a barely perceptible straw color, so you know if they actually baked it or not.


These guys have always done excellent work for me, but they don't accept decorative chrome:
http://vmplating.com/

With that in mind, you might check with these guys:
http://www.barryavenueplating.com/