Transparent stock for iGen

I am looking for options for transparent stock at least 11x17.

I am currently running "PBTrans" paper backed transparency stock.

I have used Xerox DuraPaper in the past but it's opaque.

Is there a clear version of Durapaper or something else I can look into that's at least as heavy as the transparency stock without the paper backing ?

Thanks in advance for any suggestions.

Steve in Nashville