I see the Z51Fxxx Development Kits include the OCD-Block, and Cables & Retail Box, but they also have PCB codes for the Z51Fxx PCB's alone

examples :
Development Kits PCB Part Code
Z51F3221000ZCOG ~ PCA 99C1329-0016
Z51F3220000ZCOG ~ PCA 99C1327-0015

are these Z51Fxx Development Kit partcode PCB's alone available for order - eg via an on line store ?

A separate order code for the OCD-Block as well, could also make sense, as users may want to mix multiple PCBs with one OCD, and/or replace a Blown OCD. The OCD has a Cypress High Speed USB controller, which helps with debug update speed.