Ok, So If what
@psyph3r said is true and if I understand it clearly, you have a usb to sata casing where you can plug a normal sata sdd.
Now you have a NvME SDD that you want to connect to this caddy and hence you wanted a nvme to sata converter.
Well, in that case as
@psyph3r suggested you should buy a NvME to usb casing instead. It's available on Amazon India for around 3K.
Or, for some reason you still want a NvME to SATA adaptor, you can buy this
Buy Online M.2 NVMe SSD to U.2 2.5 inch NVMe SSD Adapter In India At Best Price. Delivery within 48 Hours Any Where In India.
www.onlyssd.com