There are very few people that accept requsts for size changing stories and your looking at one of them. If you have any ideas I may be able to put them together. All that I'll need is a situation and some kind of inspiration(like a scene or process moment). here are a couple of examples of my short stories:
I'm going to try to write a short story in between every chapter of "The New Life Of Kimberly McGee". The next one will hopefully be a sequel to "A Day in The Life" but right now I'm really not sure what will happen, but i want to make them grow quite large this time. You see I try not to force the stories out I just try to make them flow like they have a life of their own. Most of these started out just by a single picture in my head. "Acceptable Losses" came about from me picturing a girl shrinking out of her strap-on with it falling to the floor between her legs. "Formula 169" evolved from an idea of a girl sneaking up behind another girl and pouring a shrinking potion on her. Sadly it didn't incorporate into the story, but I think it turned out alright anyway.
I'll do Gts, Sw, and BE. I'm not going to rule out other processes if the idea is interesting enough though.
Here's a link to another site that I have my stories posted. I've just started writing a story there that I won't be posting anywhere else, so go ahead and check it out. I'll try to post more of it every day so check back for updates.