haha, check this link out.
NED BUNNELL: K10D waterhousing
This is the President of Pentax's blog site. I have seen these on ebay and was wondering if they made them for Pentax as well. It turns out, yes, and no. Mr. Bunnell took his camera to them and they are making a custom kit for it. Im assuming they would have saved the dimensions for it for future customers, but it is not listed on their website. I also found it funny that Mr. Bunnell displayed Canon SLRs being fitted for the product! Why would you do that? It is confusing sometimes as to why people make the decisions they do. Either way, Im still hunting for something. I think this would be the best option, but it seems like you have to contact the company directly for prices since they are not listed on their site.