There are a few different covers;
Landing Pad #1-4, 8, 11, 14, 16, 17, 18, and 19 use PN 8890029
Landing Pad #5, 6, 7, and 10 use PN 8890030
Landing Pad# 12, 13, and 15 use PN 8880210
If you have additional questions you can submit a support ticket here, or call customer support at 888-925-4621 during business hours