A member of the Lamborghini Forums that goes by “Oldschol” did some work compiling the number of manual transmission gearbox LP generation Gallardos made their way to the US. That includes the 2009-2014 cars in LP550, 560, and 570 forms.
As you can see, most are the 2014 LP560-2 50th Anniversary Cars. I sold 2 of those and they were clearly going to be collectible. There are a couple others that have made their way into the US such as an orange manual LP570-4 Performante but he believes this list to be comprehensive. The factory is not terribly helpful in compiling these lists so it is a job well done.