Can I replace a recessed lighting track without replacing the fixture housing?
The track and the housing are apparently separate components, judging by the photo. The question is how well they're fastened together. I'll be surprised if anyone knows that particular fixture well enough to tell you offhand. 

I wouldn't hesitate to investigate. Disconnect power and start disassembling. Use a rotary grinder if necessary to remove rivets, screw tips, or sheet metal tabs.