My brother is looking for them too, here are a few he's found (I don't know anything about the quality/reputation of these sellers): http://americanleatherjacket.com/Star-Wars-The-Force-Awakens-Finn-Leather-Jacket?gclid=CLOVt_fh48 kCFQ2OaQod1 nEPZQhttp://sky-seller.com/star-wars-7-force-awakens-finn-leather-jackethttps://www.fjackets.com/buy/star-wars-finn-jacket.htmlhttp://www.fanjackets.com/product/john-boyega-star-wars-finn-jacket/
Matthew B. replied:
I would check the Rebel Legion forums. rebel legion.com
Dylan K. replied:
Magnoli Clothiers. Dude, I kid you not. I bought a TIE from him (my new favorite tie btw) and was immediately astonished. I bought a full suit from him and words do not describe how incredible it is. If you want the single best fitting, best looking, screen accurate replica and functional leather jacket you go to Indy Magnoli. I am convinced he is the best tailor on the planet.
Scott O. replied:
Thejacketmaker.com They make custom real leather jackets. They would probably do this one for 200-300 hundred.
Jaymi G. replied:
http://www.leathersjackets.com/star-wars-the-force-awakens-john-boyega-finn-jacket.html not sure about the seller, but there's options out there.
Scott O. replied:
I can vouche for thejacketmaker.com. I've bought one jacket from them before.