Hi,Thanks for your question. This should have the download [URL] Let us know if you have any additional questions. 
We have used the ECS Sync OVA appliance in the past for migrations.  We are looking to do the same in the upcoming months. I see the github site for the application software, but I cannot find the appliance OVA download?  How can I obtain the OVA? 
ECS Sync OVA