New types of trees from the Wandering Trader

I was thinking that new types of trees would be amazing in Minecraft. And when I say new types I mean some that also change the color of the leaves. For example Cherry or  Lilac. With that in mind I think that making entire new biomes for them would be hard, so here comes the Wandering Trader to save the day. These new types of trees would be only obtained by trading with the Trader. That way it can be much easier to add new types of trees without thinking about generation and biome aesthetics and it will also give the Wandering Trader a useful task ( because most of the time the items he sells are more worth wile to find than buy )