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Here's the Rumion part you can get your color. I think it is also plastic though.
http://www.jzsinternational.com/servlet/the-826/JDM-2008-TOYOTA-RUMION/Detail
After looking at their price, I went with the ebay ones which seem fine.

 

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I think this is was what I bought. I like it black on white.
http://cgi.ebay.com/ebaymotors/2008...TruckQ5fPartsQ5fAccessoriesQQsalenotsupported

 

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The install is easy for the front flaps you use the same holes that already there by taking off little L shaped piece. I the think the bottom hole on the front uses the hole that is for the ground effects lighting kit. That’s why they state, “not for ground effects lighting” in the ads. The back flaps you have to drill holes for (a third hand can come in handy when marking the holes to be drilled ) You also have to take off the back tires to give room for the drill to make the holes. Took me about an hour for the install these but, I take my time.