Not too many people want to take on old pool rehabs.

I know from experience. Check Vastec USA they have helped me. I have sent them pics of my issues and they always have a fix. http://www.vastecusa.com/Products.html. Also try Cardinal systems at http://www.poolsbycardinal.com/bullnose-coping-crgr.php. extruded coping is expensive. That's hy everyone wants to go new! Post some pics.

Good luck