use of lvm volume

[MGThePro]

I'd like to combine multiple partitions to form the volumio_data mount, however the lack of lvm2 in the initramfs means that lvm is not available during boot.

Is there a way of generating a persistent initramfs with custom modules without building the entire image?

Alternatively, can I somehow get volumio to boot without the volumio data partition kernel parameter, so I can handle the mount point later in the fstab?