Etsy and finally found some 2" knit ruffle fabric.
The making of the skirt is actually pretty simple, but the ruffles on the fabric do add a level of concentration. I had to pay really close attention when I cut out the front and back so that the ruffles lined up. I also did a basting stitch along the raw edges to make sure the ruffles didn't get bunched up when I sewed the pieces together.
If you already have a long skirt, just use it as a pattern and cut your pieces about the same size (its stretchy knit, so you don't need much seam allowance). If not, measure your waist and cut that measurement in half (so if your waist is 32", the top of your pattern will be 16". Again, it's stretchy knit, so I didn't leave a seam allowance). For the bottom of the skirt you decide how wide you want it to be (I went about 6" wider).
Baste (or use straight pins) all the ruffles along the long edge of the pieces. You'll be glad you did when you go to sew the front and back together.
Put the front and back pieces together (right sides together) and sew up the long sides.
Now is the time to try it on-if it's too big you can adjust it now. Once you're sure it's the right size, measure around and add an inch (so if your measurement is 32", you'll need to add 1".
To make the waistband I bought some regular jersey knit that matched as closely as I could find. I like my waistbands to be about 6" tall when finished, so that means I cut a rectangle of fabric that was 12" tall and 33" wide (remember your width will match your skirt). You can also use 2 pieces, each 12x16.5. I like to have my waistband taper, but you can just sew it as a rectangle. If you want to taper, you lay it out and trim the sides-then sew up the raw edges.
You'll have to fold the waistband over (wrong sides on the inside).
Flip the waistband so that all the raw edges line up. Sew around (use a serger or if you don't have one, use the zig zag stitch so that it will stretch). I had some custom labels made, so now is the time to sew that in too.