Looking for low power scope with focus adjust

I need a little help looking for a scope. I am looking low power scope to plug my night vision in to. However I am having trouble tracking one down with the quite specific requirements I have. They are

On the low end of the zoom I am looking for no higher then 2x and preferably 1.5x or even 1x.

On the high end of the zoom I am looking for 5x or 6x , more is ok though will be a little redundant.

Obviously as much light gathering as possible so a larger objective is preferable.

And the last thing is it absolutely must have focus adjust.

The closest I have found is the Hawke Sport HD 2-7×32 AO IR. Its ok though I’m hoping there will be something with a lower zoom and or a bigger objective out there.

Thanks in advance