"Shell Package" for Central Controlled Residential Ventilation

Hello everyone,

I am currently looking into various central residential ventilation systems. At the moment, I am stuck on a Zehnder Comfoair 350. Does anyone know a good site where you can buy the corresponding accessory package yourself and install it according to plan? That is, pipes, outlets, supply and exhaust air.

So far, I have found little information on this.

Thanks