I had Invisalign Express. I need refinements. Can I get more aligners?

I had braces 30 years ago, I went back to my original ortho for invisalign. He told me I would need 10 trays. I was never told this was invisalign Express. My trays are done & there is a tiny space between my front teeth. My ortho recommended a lingual bar but does not do. He told me to go to another ortho. I did and he told me I had Invisalign Express but I need refinements to move my back teeth which would allow the front teeth to close with the proper retainer. How do I handle this? Cost?