Is it possible to get the CNC ported heads to suit ecotec/L67 engine without the other components at a discounted price to suit?

Assuming that you're referring to the heads as shown in the link below, it's not possible to purchase the heads without the other components at this point in time.

http://www.maceengineering.com.au/epages/shop.sf/en_AU/?ObjectPath=/Shops/mace/Products/HDS603/SubProducts/HDS603