Custom Tile Pattern

I have been searching for a simple 2D tile pattern that I'm unable to find anywhere on the Web (CA, 3rd party, manufacturer); although do have an inquiry with a national tile manufacturer to see if they have the desired pattern file which could be inserted into their manufacturer's Library. The tile pattern is as follows: 6"h/6"h/4"h, staggered/offset bond, lengths of tile/brick could be 12"-14"L. I'd be happy with just the horizontal joints, as verticals would be a bonus. Assistance is apprecia

Here's a really good description of how pattern files work and how you can write them yourself without the need for any additional software... http://www.apertedesign.com/2011/12/customizing-pat-files/ There are also a small handful of pattern file generators online. Just do a quick search and you should probably find something you can use. This guy (or gal) came up with a pretty ingenious method using excel... http://www.cadhatch.com/hatch-pattern-generator/458816