Certainly you can mix her other lines, or anybody else's for that matter. I recently needed one print from that line myself, and found plenty of it at
www.quiltshops.com,
www.etsy.com (change the search catagory to "supplies"), and
www.ebay.com. Good luck, love that line, just made a dresden table runner, and as soon as I get the border on, I'll be posting it.