Yea, that type of stuff down here can be a goose hunt. We needed a new kitchen hood filter, not to be found. HD in CUN has the material but not just a new filter. So I have to take the old filter apart and put new material in it.
For your top, if you can't find it and need to order it, go to Unicornio hardware store, ejido, 115th, 2 blocks south of Constituyentes, east side, ask for Juan Carlos, he speaks fluent English and is super helpful. This is bar none, the best hardware store in town. They all know me by name, are attentive, happy and will go the extra mile. Go there!