So, I've been googling and found this vendor site: Stitch in the Ditch. Yippee, it's even Canadian. And the Quilter's Design Mirrors are only $18.99, plus shipping and GST of course. And I can pay using PayPal, which I like. So, I placed an order and included a Lazy Angle Ruler. Here's a video on this ruler:
BTW, I really love her lime green rotary cutter. I wonder where she got it.