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1) The Empire accessory feedneck. They come as standard in matte black, but I can get you a polished black one. E-mail sales@inceptiondesigns.com about that if you want one.
2) Sled is usually a WGP BM mid block sled. You can use an Empire one but there is more gap above and below the sled than with the BM one.
3) Check it, WGP BM, or Empire Resurrection (although it may need thinner o-rings to fit).