I spoke to Saskatoon Gunworks today about Areo, they can built you whatever complete rifle you want from all Areo parts, they even have a 'black rifles' link on the website for inspiration... they have literally dozens of options, just pick your lower and upper style, BCG, handguard, stock, muzzle device, charging handle, barrel lenght and type, and done... they assemble it for you and ship it 2 days after if clears the CFO.
You are going to pay import fees for a rifle far less custom and then spend money changing what you don't like.