I don't mean to be rude, but 2K actually got Russell Westbrook's look pretty good this year, I don't see why you'd want past 2K versions. And for Ray Allen, AmaroWaade already converted his CF and it's up at moddingway.
I think the best way to help with conversions is by converting role players, because they usually don't get much attention unless most of the stars have been released already.
You can always do whatever you want and we will always be thankful for any help. I'm just suggesting a way to not waste your effort. Good luck!