Jet Pro SofStretch for lights is what I use and have had great results.
Haven't done any darks yet but after researching the forum I invested in some 3G opaque. If I'm not mistaken I believe both are made by Neenah, an industry leader.
I'm also located in MO. If you need it right now Coastal Business Supply is one of the cheaper sellers and have a physical store in the StL area.
Only bad thing is you'd have to pay sales tax if shopping online (since Coastal is in MO) but I found the price was still LOWER than many competitors. Hope this helps