Yep, that's part of my reason for looking for something as well, I need a MP Smokescreen for example and having a quick browse of our own KO ID section there's nothing stating there is on in the first 5 pages of posts, yet I've seen things saying that it does exist.
And your example of KO rumours is also relevant, I've seen a lot of speculation for instance that there's a KO of MP-5 Megatron but nothing concrete.

On that topic what do people think of stores that sell KO MPs? If a store was selling both KOs and (what they claimed were) real MPs would you buy from them or go somewhere else?
Just for example, I've been looking at some items on toybento but I know that they sell KOs and "factory seconds", is it worth the risk buying something that they say is real when they openly sell fake items?
Just looking for opinions, thanks