Tessellated geometric floor planner needed

[Makone]

I'm looking for a decent geometric floor planner program/resource and having a little trouble finding anything useful on the net. My client has bought loose tiles with no floor plan. I'm not sure who she got them off, but apparently its a small firm that furloughed the only geezer in the office who knew how to make one (helpful) This job is actually a fairly simple pattern, the octagonal harrogate pattern with a kingsley border. Its just that I keep getting these kind of jobs and I'd like to be able to pre plan rather than spend a long time setting out on the job, when it would be infinitely preferable to do the math on my sofa. Especially when I'm just too damn busy to waste so much time on the job. Any help much appreciated. Thanks in advance.