"One" (that is: me) wanted to have one custom made, but DH insists he will be able to do it for me at a fraction of the cost!
Anyways, I guess there isn't too much to them....so I am looking forward to "insisting on particular details."
ETA: and I will be doing my own "custom" cushion, too. Much easier than trying to find what I like. Gotta love Joanns!