Crackberry, that one is almost impossible to find. I found one in Ebay a couple of months ago, for almost 300U$. My advice? Get one in leather for it. I could find a guy here in Sao Paulo, Brazil, that did an exact replica of one I HP-01 with leather band that I found in retroleds.net. If you want, mail me and I can help you with that: facundoxxx@hotmail.com
Good luck!