Probably not, in all honesty!

The fleet lists section was setup, including the rather ambitious project of collating all independents, at a time all of us had a lot more free time. That time is increasingly scarce these days.

Generally speaking, fleet info, other than from Go North East, is not readily available. When we have updated in the past, we've generally had to pursue it from the various companies. Providing fleet lists to enthusiasts isn't their number one priority, so as you can imagine, this proves to be quite time consuming.

The fleet lists were also added to the site at a time before bus open data was a thing. So on the most part, https://bustimes.org/regions/NE might actually provide what you're looking for.