The short answer is no.
The long answer: I’ve started revising some of my earlier games. So far, in the process of revising games, I find myself making some big changes that end up making an upgrade kit unfeasible. I simply change too many things because I’ve really grown as a game designer and the changes I am making might be minor (for example, change a card from 1vp to 2 vps) or major (like adding a whole new component)—but they all produce a very different game.
That’s one reason. There’s also a financial problem. For upgrade kits in general, here's my problem: although I may give the appearance that Dr Finn's Games is a well-established company, I still only have 1000-1500 games manufactured at a time. I have a dedicated group of “insta-backers” who buy all of my games, but I still have a hard time in this highly competitive world of boardgames. Since I only had 1000 copies of Institute for Magical Arts made, for example, probably 50-100 people (if even that), would want to buy the upgrade kit (if I could even make one—given all the changes). Since I have to make 1000, I'd have to charge a good amount of money to cover my costs, plus the shipping.
If I sold 3K to 5K of each of my games, upgrade kits might be something more feasible.
In the end, though, the games go through such a revision that you'd have to upgrade almost everything.