For those who may want to try this, there is a fairly simple way to get a similar shape in the right size and length. Buy balsa wood "trailing edge" and glue two together in the proper shape and cut it and finish it. It needs to be ~5.45" long. It comes in 1-1/4" length. You can get it at hobby stores and online/ebay.
I believe that these are ~15 degree right angles so you would turn one around when gluing them to get a symetrical centerline. I would do it, but already have the acrylic. But if someone wanted to and let us know what they think, that would be great.