Touch-up Paint 2010 Legacy

I have a 2010 Legacy that is Steel Silver Metallic and I have been trying to find the touch-up pens somewhere in town and I have looked around the typical stores such as AutoZone and Advanced Auto Parts, but I haven't been able to find any Subaru colors at all. Are there any paint pens from other car brands such as Toyota or Honda that will match the paint? The paint code is C6Z but I'm not sure I should try a different brand paint or a universal paint, or just suck it up and order some from Amazon. I would prefer to buy in town, though.