Just create your own sink cover by using a cardboard template and make from wood. Measure, template, cut, sand, finish, DONE. Better yet, instead of finishing with stain and/or varnish, use a food safe cutting board oil to make it a productive cover that doubles as a cutting board.
shelter for the camper with covered porch for sitting in the rain, cooking out etc. Enclose 1-2 sides fence a yard for the pups. Yep, temporary home while we build our permanent one - then it will be a nice little guest spot :)