http://scottishkilts.net/products/st...ched_kilt.html

You might take a look at this Tartan. It's a machine made 8 yrd on sale. May or may not be grey enough for you.
I wouldn't go with a 4 yrd casual kilt for this. Matt's 4 yrd box pleat would be great, but that's all together different from the 4 yrd kilts your seeing advertised. They are just skimpy knife pleats.