I think you mentioned a few questions about getting back in to windsurfing.
I love old gear and am NOT a gear freak, and I'm all for getting old gear out and having a crack at it. However, I reckon you aren't doing yourself any favours with a fin like this. Flexible, inaccurate molding, not very strong etc. Even if it was straightened, it would still be a very mediocre performer and cause you substantial frustration. I'd strongly suggest:
http://www.surfsailaustralia.com.au/showProduct/Windsurfing/Fins+Above+29.9cm/progressionUS/Select+Progression+Freeride+Fin+US+Box, or something similar as a much better option.
Good US box fins (for slalom/raceboards) are quite hard to find, especially with any depth/area that you would want for good performance. Also note that once you get above the mid 30 cm range, they are getting close to their limit in that style of fin box.
If you can't find something local, True-Ames probably has the widest range of US box fins of any manufacturer, it is just hard to find a shop that sells to Australia. The best dealer I've found for international orders of their products is windance board shop in Oregon, eg:
www.windance.com/True-Ames-Slalom-Pointer-34cm-WSWF374934AB/Clarence
