Diesel cams are slightly harder to come by, on account of lack of demand. Also, you're going to need a set of 2, for the DDiS.
Rahul, EP used to charge 16 or so for a brand new cam, not a regrind. They were Crow Cams, made in Singapore. Crowers are slightly more expensive, should be over 20 for a Stage 2 Vtec cam. Ritesh should be able to shed light on this.