Sure. If it has a standard 4 foot tube, there are any number of variations on that. Just search amazon (or even your local big box store) for florescent replacement.
Note there are at least two variations you need to consider:
- Ballast use or not -- some will work with the existing ballast, but most (or IMO the better ones) you remove the ballast entirely. I think you should remove the ballast as it's one less thing to fail later, and/or to consume energy, plus it makes the fixture lighter.
- Single end or double end - some tubes you wire so both neutral and hot go to the same end of the tube, and no wires to the other. Some you are expected to wire hot to one end, and neutral on the other. I'm not sure there is a benefit to either, but you need to match tube to wiring.
In addition you can choose color temperatures.
Note none of the tube replacements that I have seen are dimmable, including many that SAY they are dimmable.
You can also get replacement tubes that are brighter than the originals if you want. But since they aren't dimmable be careful not to go overboard.