Why has this been rejected?

I was typing a post here outlining what your cut-outs need to improve in order to be considered for addition into the megapack :thup:

I can send you the original images so that you can do the cuts to a good enough standard?

Sure, you can request them on here using the upload image button. You could also take on board the techniques outlined in my other post and produce better versions of these cut-outs yourself. Following that guides, you should be able to cut sources like this, which are presumably quite straight-forward, in just a couple of minutes ;)