yeah they have some nice extra fine paint pens too. i grabbed a silver one and its become really handy. unfortunately the scrapbook moms snatch up the other ones lol..
http://www.testors.com/product/136633/3502X/_/Liquid_Cement_for_Plastic
Have u tried testors liquid glue in the jar. The cap has a brush applicator on it. I drop some in the window sill and let it run down then drop the window in the sill. I've had good luck so far.