Thank you for your suggestions for NVMe products. We can look into your suggestions in modifying some of our existing designs to supporting PCIe NVMe connections. The MB522SP-B suggestion is certainly more possible, as it is somewhat similar to one of our existing products, MB834M2K-B (https://www.icydock.com/goods.php?id=334).
As for the MB511SPO-B suggestion, the main design consideration for the MB511SPO-B is to be used in place of a laptop's optical drive bay. A PCIe version has some major points that need to be looked into, such as power and board space to allocate for all lanes on the PCIe connection. Additionally, this kind of product would be limited to a PC case and heat would be a concern.
We are currently developing multiple PCIe NVMe products right now. You can take a look at some of them at our concept products here: https://www.icydock.com/goods_cat.php?id=166 Additionally, you can sign up for our email newsletter here for information on our new products and new concept products: https://www.icydock.com/epaper.php
Please let us know if you have additional product ideas for us to look into. We do consider all reasonable product suggestions and look into them.