I don't think anyone has mentioned this yet, but finding a correct, carbine handguard for the 1896 sight is probably as difficult as finding a sight.  You can certainly find the rifle sight to use as a substitute, but an original handguard …..   There have been reproductions made over the past several years, but currently, it has been sounding like those folks have stopped producing anything.  I have heard many comment on the forum about using eBay and you may, indeed, find a reproduction handguard there. I think several of our members are actively involved in coming up with some good ideas for making something available in the future.  I'm sure someone who is closer to the topic will have some helpful information.