Clutch Cover Repair??

1986 CR125 has corroded clutch cover where the water pump impeller sits. Honda cant get the cover any longer and it's unusable a it is (water getting pat seal and into oil)....any suggestions? I was going to try ad rouch it up good, apply some jbweld and get it a straight as i can....i have called several alvage yards and noone has these parts for this bike!! Please help!!

Thanks for the quick response, I am giving consideration to some JBweld or something similar, still searching for a new cover or used one, only issue i have is that it is corroded RIGHT where the seal sits...im unsure if this is the common spot or not, and im not sure how JB weld or other epoxy will seal up in that area. With the seal in you can still see/feel the top of the seal.....which I beleive is the entire cause of my leak....seals and bearings had already been replaced and shaft is slightly grooved but very minimal. Thanks for the link i've got the page bookmarked already lol. Bike came from an add on Kijiji, good chance it was posted on craigslist as well though...