Inventory MFG, adjustable timing pulleys & harmonic dampers

We're at the point of looking to build inventory on parts.
The adjustable timing pulleys and harmonic damper replacement.

https://www.nicksforzaferrari.net/adjustable-timing-belt-systems.html

We get requests for these parts every so often, but given high mfg costs on low production runs we can only mfg every so often.

So if anyone is interested or looking for these parts we'd love to know to get an idea on qty to mfg.