Off-host and Snapshot solution suggesiton

I am in a stage of designing a solution for customer who is already having NB5230 appliance and Netbackup master server windows 2012 R2.

custemer wants to backup vmware clients as below.

snapshot will be taken at client side and copied to MEDIASERVER or any other server.and then release client resources. 

netbackup will backup snapshot from offhost server and source client will be released.

Is there any hardware based snapshot server available?

kinldy help.