Amy plaid shirt, gray leather, beige leather jacket alts! (And some Rose!)
http://www.abercrombiekids.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=10851&storeId=10101&langId=-1&categoryId=12122&parentCategoryId=13098&topCategoryId=12102&productId=809916&seq=04
Oh red plaid TIA shirt...such a seemingly common print but so difficult to find. After looking at every single preppy store website I could think of, I wound up at good ol' Abercrombie and Fitch (which I haven't worn since...middle school, I think) and found a couple pretty-darn-close shirts. Yes, this one's a boy's shirt, but if you're like me and not particularly gifted in the decolletage area, boys' shirts will actually give you a fit more like Amy's than a woman's shirt will. I wear a lot of boys' flannels and am usually a 12-14 in boys (for reference, I'm 5'5", 34 chest). I ordered the XL and am will report back on fit once I receive it. If you're truly, truly tiny, there is also an Abercrombie girls shirt with a very similar print (and it's on sale) here: http://www.abercrombiekids.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=10851&storeId=10101&langId=-1&categoryId=77086&parentCategoryId=12105&topCategoryId=12103&productId=815720
Also, there's a man's shirt at Hollister: http://www.hollisterco.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=10201&storeId=10251&langId=-1&categoryId=12558&parentCategoryId=16398&topCategoryId=12551&productId=824467&seq=03
Again, none of these will be particularly helpful if you're curvy, but if you're more boy-shaped, these might be good alts for ya. None of them are exactly bargains, though.
Moving on to the Night Terrors jacket:
https://www.lilyboutique.com/shop/outerwear/bridget-vegan-leather-moto-jacket-in-gray/
Decently priced at $43
And the same jacket in beige seems pretty close to the GWW Topshop jacket.
https://www.lilyboutique.com/shop/outerwear/bridget-vegan-leather-moto-jacket-in-beige/
And finally, a pretty good alt for the Idiot's Lantern jacket
https://www.lilyboutique.com/shop/tops/your-new-favorite-jacket-in-citadel/
Hope this helps!