Le coq sportif isn't available for retail in the US. I think only the R1000 Swans were released by Concepts, but other than that, you won't find them in US shops. There are a few places that carry the collabs and GRs online, but most of them are small European shops that can charge really high shipping costs to send the shoes overseas. The best way to find out where you might get LCS is to research past collabs with stores and look up their current inventory. klekt.in is also a pretty decent secondary market resource as they primarily cater to the euro market.