Hi.
All Casio drawers have the designation DL, so you are probably correct. You will need to obtain them from a Casio dealer. Best idea is to look up cash register dealers in your area in the phone book, then find a Casio one in the listings. If none of them list their associated brands, just ring a few and ask. It's a tight knit community, so they will usually know who supports Casio. I should warn you that they will probably cost a lot of money. The drawer is expected to last for the whole life of the machine.

Mark