I can source 1 gallon M. Californica rootstock for $20 a piece from a nursery.
I know they are around and hopefully everyone that needs them can find them at one of your local nurseries.
I could likely fit 4 in usps priority large package , depending on the root mass and plant structures.
I haven’t seen the plants so can’t speculate.
If anyone cannot find these locally and is interested in a 4 pack shipped to you for around $110 including the shipping, let me know in this thread.
If there are 5-10 people interested then I could potentially make this happen in the next few weeks.