I just tried all of Mr. Collado's sites. I couldn't get to one, but the store at www.kenpokarambit.com seems to be working this morning. He has both dvds for sale there. If that doesn't work, his school site www.paakenpo.com is also up and running, and he has phone, fax, and email contact info listed there.
I bought the first DVD when it came out, and eventually want to get the second. I am not knowledgable when it comes to karambit (or other knife), but I enjoyed the dvd, and feel it was valuable for me. My first three years of Kenpo training was in a school that Mr. Collado co-owned, so I am a bit biased - he earned my respect and trust through all of our interactions over those years.
Good luck getting your hands on the DVDs, and I hope you find the information valuable as well.