I buy the fabric as requested. And I usually start with plain, smooth, cotton (or a blend) fabric, and I then quilt the saddle pad. Sometimes I can find the fabric pre-quilted, but more times not.
I can do stitching/quilting like these: http://img.thefind.com/images/WwC7cf...0ZGAA*?m=1&g=1 http://partrade.net/images/products/302070.jpg
Im working on perfecting my stitches like this to where I can do swirls and what-not:
Im decent at it enough, but I have to work slow when I come to the designs so that I dont make a mistake (thought its not that big of a deal if I do, I can always start over, but it's a pain). I just want to perfect it before I offer more intricate designs.
For the standard square/diamond stitch, you can tell me how big you would like the squares (1" by 1" or half that, more, etc). I trace the design onto the pad fabric before I start stitching so that I know exactly where I need to sew each time.
OH, and for the batman patch, they are cheaper, but the disadvantage is that they are from Hong Kong and Thailand, and wouldnt arrive until a few weeks later. To be honest, it would be your call. The more expensive ones would come within the next day or so, since they are from the US, or the others which cost a lot less, but take weeks to arrive. It would be all up to what you would like to choose.
How thick would you want your AP pad to be? The Filler is what makes the difference in cost. What I have posted as costs on the OP is just a general cost.
As for photos, I used to have some, but I recently got a new laptop, and lost them all! It sucks!