There isn't much out there anymore with T8 bulbs. Something like this might work, but I think the way they wrap the fixture around the bulb is an awful waste of light.
This thread might give you a few pointers. If not, I'd say check out some of the online retailers and see what they offer, like DrsFosterSmith.com, BigAlsOnline.com, Hellolights.com, etc.
This thread might give you a few pointers. If not, I'd say check out some of the online retailers and see what they offer, like DrsFosterSmith.com, BigAlsOnline.com, Hellolights.com, etc.