Looks like a handful of fake curved pump plates are hitting ebay. I hadn't seen some of these listed before.

http://www.ebay.com/sch/toopat53/m.html?item=291600793586&hash=item43e4c2fff2%3Ag%3AelsAAOSwAYtWLTfy&rt=nc&_trksid=p2047675.l2562

http://www.ebay.com/sch/565bbcjohn/m.html?item=171981258543&hash=item280ae1bf2f%3Ag%3AlcEAAOSwhcJWMAaI&rt=nc&_trksid=p2047675.l2562

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Curved Shell

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Curved Texaco

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Curved Humble