Well, when I was talking about the market not offering things at our budget, I mean we won't privately commission them because we could just do the labour ourselves for much cheaper. Their prices are perfectly sensible, we just can't justify paying them when we have the skills to do it ourselves (or learn to do it ourselves.) There are private commissioners for just about everything (especially in the superhero costuming community) so it's never a matter of not being able to find them.
Two-layered capes are a breeze. Cut the shape of your cape out twice, once in the inner colour and once in the outer colour. Sew around all the edges, leaving a gap at the neck so you can turn it right-side-out. Press all seams so they're extended properly and then top-stitch. Close up gap either by hand or by ironing over the edges to match and then top stitching. Obviously there'll be little bits of variation depending on what shape the cape is, how big it is, how it attaches, etc, but most two-layer capes take me about 2-3 hours at most and cost less than $30 in materials.