Turns out they make heatsinks for TO-92 packages. Felthry was cracking up when it saw this one the other day; it looks ridiculous.
You don't generally use anything in a TO-92 package if it's going to be dissipating any significant amount of heat, so I'm really not sure what the point of this heatsink is, but it certainly does look ridiculous.
@Rosemary ah! I can see that lol X3