There may be such an adapter. But be careful. The image that the 2/3" lens projects onto the chipset is much larger than the camera will be looking for. As a result the widest setting on the lens will not be nearly as wide as you would expect - (i.e if it were on the 2/3" chip camera it was designed for)
I have a cannon wide angle lens that came off of a 1/2" camera. Using an adapter, I can mount it on my HPX300 (1/3" camera). So I give up quite o bit of "width" but I'm OK with it in most situations since it's much better glass than the stock lens that came with the HPX300.
Putting a 2/3" lens onto a 1/3" is likely to exasperate that issue to point of futility. Perhaps there are adapters that actually reduce the image to project onto the 1/3" chipset. I didn't see any such adapter wen i did my search 7 months ago when I bought my 300.
Best of luck,
Production is fun - but lets not forget: Nobody ever died on the video table!