The Avenger decal, they were being sold on ebay a while back but no anymore. I think neonchick on ASEC makes em' still. I could pm her for you and get back to you.
The tails, I'll pm you ( just woke up cant type too much

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Debadging was easy just a blowdryer to heat up the surface a bit and fishing line to saw the letters off and a 2$ bottle of Goo-gone from autozone to get rid of the remaining sticky stuff left on the car. Put a coat of wax on the spot after youre done and you should be set.