We generally don't supply cases to customers for two reasons.
1. When it comes to lens case quality and design, the taste tends to be subjective. We have been trying to pinpoint one case manufacturer to fit for all, but haven't found one.
2. The actual measurements of each lens can vary anything from 2-6mm depending on the model of the lens. This means that to get the exact measurement we need to complete the lens before sending the dimensions to case manufacturer and this would delay the delivery process somewhat.