Yeah, I've gotta agree with Str8stroke. I think you went about this the wrong way. Most potting materials can be removed without damaging the underlying hardware. Its not always easy, but it can be done. I think you've gotten a bit too aggressive with your light and may have made a costly mess.
I think your best bet is going to be to contact Henry and see if he'll just sell you the parts you need. I'm not sure if he does that or not, but I can't imagine there's any third party sources for parts for his lights.
As an aside, care to share some pics of that "pill"? I really would expect the HDS lights to have a shelf in them, not a pill, so I'm curious about what you've found.