The issue lies in the fact that, unlike not very long ago when the industry standard was 35mm over digital and full frame shutter units were common and mass-produced, today these units are reserved for mostly high-end models. So with production at only a fraction of what it once was, this means that demand and supply also dropped, leaving only one or two manufacturers worldwide. Our main mistake was made at the pre-Kickstarter stage; To get a realistic idea for off-the-shelf component costing, we went down the route of requesting quotes from sellers that supply parts for repair and service centers, as they can be bought in bulk and often come straight from the manufacturer. While in this case we don’t suspect bad intentions on the seller's part (since we had used once of their samples in the prototype), the shutter units became unavailable to us in large quantity once we were ready to order after DFM was finished. While at first sight many other sellers seemed to have access to service parts, and we felt reassured by our quotes, it turned out the supply chain has become so extremely limited, that no-one was able to help us with a substantial order.