[Info-vax] VSI VMS V8.4-2L2 availability?

[Slo]

I have VSI VMS V8.4-2L1 installed on an XP1000. It looks like
this box can run the enhanced VSI VMS V8.4-2L2 as well, but 
I can't find the kit anywhere. 

Q1: Why is there no ISO available in the same location as the 
VSI VMS V8.4-2L1 kit? How does one qualify to obtain it?
Q2: Any experience to share when upgrading from L1 to L2?
Q3: Is it worth it, and in what areas one should expect better performance?

Thanks.