I am trying to fix a place to house some chickens. Bought an old metal nesting box, 10 hole, at a garage sale. The bottom metal pieces for each hole need to be replaced. Saw where a hatchery had them made of plastic but don't know if they will fit and their customer service isn't open on the weekends to call them. I really don't want to spend alot of money and hate to pay shipping. Will still have to buy outdoor grass type carpet once I get the metal replaced. Any suggestions? I am new to this and appreciate your advice.