Amazon. That's embarrassing. Because I live in such a rural area I have Amazon Prime but for some reason I never thought to look there because I was concerned about the local hardware store.

I'm going to pick this up unless you suggest otherwise (and no, my local hardware store does not have this as I called): http://www.amazon.com/gp/product/B00...=ATVPDKIKX0DER

I'm going to pull the lens completely, scrape it down, clean it and then use the silicone to re-seal it.

Thanks again everyone for taking the time to make sure I do this right the first time.