Firefly Malcolm Reynolds Suede Leather Trench Coat Costume (L) https://www.amazon.com/dp/B01DROCVXO/ref=cm_sw_r_cp_apa_i_GjU1Bb450DWP1
It's not perfect since it's got a seam around the waist, but it's not very visible unless you get close. The nice part was that they did check all my measurements to make sure it would fit well.
Here's the info on all of the individual pieces.
Also, big shout-out to Bronson BB on the RPF for putting together an awesome thread that was my go-by:
https://www.therpf.com/showthread.php?t=56865&highlight=Malcolm+Reynolds
Thanks to Eloise Hands for a great Kaylee jumpsuit for my wife to wear alongside: https://www.etsy.com/shop/AuthenticityCosplay
Shirt: eBay find. Pronto Uomo Dress Shirt in Cordovan from Men's Wearhouse
Pants: Scully Rangewear By Men's... https://www.amazon.com/dp/B005DIN2QS?ref=yo_pop_ma_swf
Pants stripe: this ribbon in brown, died 40 minutes with Rita chocolate for nylon: https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F282994081782
Browncoat: Firefly Malcolm Reynolds Suede Leather Trench Coat Costume (L) https://www.amazon.com/dp/B01DROCVXO/ref=cm_sw_r_cp_apa_i_6fW1BbMHY8A08
Boots: Telacos Firefly Serenity Captain... https://www.amazon.com/dp/B07FTG5ZJC?ref=yo_pop_ma_swf
Suspenders: the officially licensed ones. Got them at ThinkGeek, but they're out of stock now.
Gun: Note that this one is full sized, which as a result means it's too big for the holster. https://www.etsy.com/listing/590554689/firefly-serenity-captain-malcolm-reynold?ga_order=most_relevant&ga_search_type=all&ga_view_type=gallery&ga_search_query=malcolm%20reynolds%20gun&ref=sr_gallery-1-2&organic_search_click=1&cas=1