Quoted from LukyDuck:
Lior’s OZ lanes mod
Steve G’s monkey mod - no longer being made
Steve G’s witch 2.0 mod - list full
Steve G’s witch 1.0 mod - no longer in production, but owners are starting to sell due to buying witch 2.0 mod
There are other mods that people will mention and I do not own.
so basically one mod to possibly buy for today's woz owner.