First vuplus should provide support to dou2 problems before launching new model
As a satellite dealer surely you have greater contact, with VU+, than any of us, and a list of clients, with complaints.
Have you contacted your supplier, of VU+ receivers, and requested that they contact their supplier, or the manufacturer, to get answers as to why the VU+ receivers, you've tested, don't work on the high Symbol Rates, on 88E?
If you can contact other retailers, in the Asian market, with similar problems, you could form a group, and threaten legal action, for false advertising, and selling products unfit for their purpose, providing you have evidence that these are genuine VU+ receivers, and are incapable of scanning in these channels.