The entire assembly P/N A132L0081H (which includes the overpriced pump) is only $363 at lotusparts.com, which is probably pretty fair... still, if you can find the denso/asian number, that should save you loads.
Parts Manager @ Sports Car World in Dallas
2014 Evora S 2+2, Racing Green Metallic
1986 Esprit Turbo HCi, Red
(sold) 2005 Elise, Saffron Yellow