Good Morning Prescott,
Because we started using the Leafield C7 valves so long ago we are now out of replacements as well, I am going to include a link here about replacing your own valves. Kyle, our repair guru, is out of the shop this week but will be back next Tuesday if you want to give him a call and talk about the process as he is always happy to help. Please let us know if you have any other questions!!
maravia » Blog Archive » Repair Tip = Installing a new C-7 valve