I'd hand roll and dip in dark chocolate, Hand made Artisan. the mould is quite generic, and is flat on the back then you would still have to stick the two together... I'd get out a ruler and make a template size 2cm x 15cm, and weigh the chocolate for each piece. the result would be consistent, and hand made. + you wouldn't have to store the mould. simple aluminum foil would suffice for the wrapping and a sticker for decoration. If the mould is a must you may want to split a plastic pipe in half lengthwise to give you a DIY mould. the box from the dollar store... may want to seal it with Mod Podge.
good luck please post a Taste O'gram and pictures of your master pieces... sounds delicious