After some research I'm pretty well convinced that this is a Heinrich Stork 1 - USA version. I've posted a wanted ad for the tips, but gotten no hits. So I thought I would bump this up and see if any of you can help me out.
The alternative is to throw away the whole wing or maybe try some sort of repair, which I would probably screw up and end up with a flying piece of ... junk.
Please save me from my attempts at a repair