Sigaba: Yes, you can mix sizes and styles in the same order and still get the discount. They all take the same amount of labor and use about the same amount of materials. I charge one price for both sizes because the pricing is based off of my costs for the smaller pieces. So if you're buying the full size version, you're getting an "added bonus."
The full size spork is what started it all, and it's the most popular style, so I make the most of those. If you want a style that I'm out of, you can place an order for it and I'll plug it in to the layout for the next batch. I've been doing at least one batch a month, so the wait time on these isn't what is for my knives. I try to keep some in stock at all times, and when I'm getting low, I send another batch of Ti over to the waterjet cutters. But I do run out.
I wasn't planning on doing a folding spork - my first dealer offers something like that already, and I don't want to step on their toes. Plus, that really doesn't fit with the design ethos on these - strong, one piece construction. Adding a pivot means adding a potential failure point. I dunno... Now you've got me thinking... Maybe I'll tackle this in the future, but between building the next batch of blades, prepping for a show, these sporks, two custom nylon projects, and the Zippos, I've kinda got my hands full at the moment.