How much difference in price ?
Riflegear.com has a number of listings of CZs marked BLEM. The price difference seems to run $40-$70 off full retail.
For those who reside out of California they have SP-01 (18 round), SP-01 Tactical, SP-01 Shadow Target, SP-01 Phantom, P-01 (14 rd), TS Orange, Rami (Cal legal), et al.
No affiliation other than as a customer.