I doubt that FR has kits or finish materials now for your trailer. If your handy with woodworking, how about just building the drawer box and installing it on some casters. Might have to go to a paint store to find some stain to come close to what you already have in trim colors. Exact match, I doubt it. But I think you can come close.
Have fun, let us know what you come up with.
Happy Trails and God Bless