One company,
http://www.andvinyly.com/ will take your cremated ashes and have them pressed into vinyl. Check out the price guide for some interesting options.
A variety of companies will take your cremated remains and turn them into a diamond. For example,
http://www.cremationsolutions.com/Cremation-Diamonds-Made-From-Ashes-c39.html is but one of many companies proviing this service. Maybe you could find someone to make a diamond tipped stylus from your ashes or maybe a low friction and durable part for the tonearm assembly.
I've also heard that there's at least one company that will take your body and using something that looks like a massive industrial press, compress your body into a variety of shapes. Would it not be touching to have your body come out in a traditional coffin shape so that your remains can match those coffin-shaped speakers you bought?
