Device updates should still be in CCO and they are usually in format of device_platform/pkg.zip.
You should be able to check if any device update is available via CS > Software Centre > Device Updates. If the customer is not on LMS 3.2 SP1 (aka LMS 3.2.1), he might not see any updates due to a bug affecting LMS after url's changed for device packages.
Usually device packages are required when there is any issue with any perticular device, for feature support like config mgmt, Inventory, SWIM etc. If your customer has any specific issue with any device or performing any perticular LMS feature, you may share so to have that troubleshooted.
-Thanks
Vinod
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