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I would like to download this pack right now, though I would also like to do so via paying you. I don't have anything to donate atm so I was wondering,If I were to download this right now, where could I donate/pay you later once I have more than a few bucks on me?

Yep.  As long as you visit the page directly instead of going through your owned assets link.  I will also have a new "textured" terrain kit coming out soon that will be pay, so you may want to wait for that.