Not sure how much notice the Dev team take of this forum - best bet would be to write to Dreamtonics and the voice bank seller directly and ask about a V2 release.
There isn’t anything the folks on here can do to influence this request, unfortunately.
I should also point out that response to the V2 voices has been … mixed, should we say
From my perspective Solaria I is far superior to Solaria II and I am still using V1 in the V2 software. The extra tweaking options available on the V2 voice are far outweighed by the sheer quality of Solaria V1.