Finally got this package and it did not disappoint. These are the JDM LC250 rain visors and from my limited time with them, they should fit the GX550. They do have a TOYOTA embossing on them though
What I didn't know about these visors is that they use hardware as well as double sided tape to stay on. Also, they are clear tinted where they overlap with the window. They are pretty low profile and not as "bubbly" as the other stick-on rain visors I've seen. I picked up a couple sets to save on shipping but will offer them here before I post them in the LC forum