From what I understand, the Canadian government had a standing policy against any foreign weapon sales. So no, there were no Long Branch-made C1s/C2s sold outside of Canadaicon. I'm told that they did try to sell parts to other nations that had L1A1s, but they were turned down as too expensive and too "oddball" in many cases compared to standard production.

Because of this, Long Branch Arsenal eventually lost its relevance once the Canadian Forces were fully equipped by the mid-60s, and was finally shut down in 1976. And because Canada dropped all their C1s and C2s in the shredder in the 90s (including 50,000 Colt Canada-rebuilt C1A1s in war reserve), all that remained were a comparative handful in civilian and police hands, and whatever parts were sold off as surplus. Needless to say, assembling a C1 or C2 of any sort in the States is a daunting task!