Somewhere in the case there should be a label that indicates who made the case. Contacting the manufacturer (it's not Bakery Dry).
You can also post a picture of the case showing the area(s) around the fixtures. Someone may recognize the manufacturer. But at this point we don't have enough information about the case to begin suggesting solutions.
Thanks Clay. I found the manufacturer's video online. Its made by True and they have an excellent video on how to change a bulb...not apparently obvious on first inspection, but now I know. Thanks for the response!