Yeah, there is the glass one its the Ameripol top, it comes in a blue tint and a dark brownish tint. I'm not sure exactly how you go about getting it, although I know that Todd Huff, president of TeamSol International knows. You may want to try and contact him through the Team Sol site:
www.teamdelsol.com I think the top costs about $600 or so, its not cheap. Other than that, I don't know of any...
~Morgan