Hey I hope you're doing well, Hayden messaged me to contact you he thinks you might be interested in this:
www.maseratilife.com

Refurbishing the Power Unit (Solenoids)
I've got some work coming up under the car, and I thought I would try and refurbish failed solenoids. I spoke to a tool maker who was familiar with manufacturing and refurbishing spool valves, so I figured I might as well try it out. If it works it would cost about $400-$600 AUD per pack...