Looking for 'RTS buildings set' asset

I am working on a RTS like game and need buildings for it. As I am just a programmer, who doesn't enjoy creating art and this is just a hobby project, I usually buy the assets (graphics/models) from the asset store.
I found quite a few RTS like building sets in the asset store, but none that matched the style/theme of my game.
The style of the buildings should be similar to the buildings from command and conquer (3).

As I have spent the whole day looking for such a set of buildings, I figured that I could ask here if somebody knew such (or a similar) asset/pack.

It would be even cooler if each building had multiple upgrade levels.

PS: I hope this is an appropriate location to post such a request. Otherwise please movr/delete this post.