Export Selection as MS-DOS CSV File with 12 commas

Currently using Excel 2010 and looking for a macro that will export a selection (will be part of a column that I select) and export as an MS-DOS CSV file (no quotes around values, each row on different line) with 12 commas after each value in the selection.

Attached is a text file of how I would like the output. If possible, I would like a dialog boxt to appear for saving the file to a directory and name that I chose.

Thanks.