Creating Separation lines between rows of content

I have several hundreds pages from a catalog we are creating that need separation lines between columns to segragate the products. I am wondering if there is an easy way to automate the creation of these.

I tried using the Grid feature ( by drawing a frame and then using the left and up arrow keys to create the grids, but it creates a number of boxes where I need just separation lines. 

I can create the seapration lines manually but this takes longer, even if I save them as a snippet and place multiple times.

I am using Indesign CS6

Please see the attached screen shot.

http://www.wdautoparts.com/pdf/page-12-without.pdf

With grids -

http://www.wdautoparts.com/pdf/page-12-with.pdf

Any suggestions for this noob would be greatly appreciated.

Thanks