Looking for Auto Parts, buick riviera, buick dealer

I have a 1990 Buick Riviera and am having trouble locating the two small plastic horn covers that click over the steering wheel (where you hit the horn).  They are shaped like a half moon.  I believe the parts #s are 16750741 and 16750742.  Not the horn noise buttons, but the covers.  My interior is maroon.  I'm also looking to replace the side Riviera insignia that glues on.  Do you have these parts or know how I can obtain them?

Answer
Pattie being that your car is an older model there is a good chance you will find these parts at salvage yards. Check around you might get lucky. Also you can always go to the BUICK dealer and order the parts...this would be expensive, but not to expensive being that your car is 1990. Good luck.
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