There's a couple/few of aluminum RIB manufacturers, all in either the NorthWest, or along the Gulf Coast (Well, there used to be; that was in 2004 when I was looking.) A few more in Canada.
Northwind was one, Titan (Canada), Polaris Inflatable (Canada), and one which I can't find now in either Alabama or Georgia. In addition, there's SAFE Boat in Washington (not a true RIB, as it uses a foam collar.)
Guy at Polaris has built commercial boats for the US market; he can advise on all the legal stuff of using a Canadian boat for US commercial stuff.