RIPE IP block over vRack

Where to order a static IP block?
I want the IP / 27 address pool to be available via vrack on any of the future ESXi servers (4 IP addresses on a dedicated server-1, 4 IP addresses on a dedicated server-2 …) without MAC-binding
I ordered a dedicated HOST-32H (with vRack), but I can't find where to order the IP block.
Now I use IP failover / 27, but this is not what I want