New Kodak Ektachrome is not available in these conversions.
This is still correct Europan !
But pls. don't forget (you of course are knowing well) : All these formats you mentioned are very
special! What about 65mm (movie camera film) = cinema is with negative film, and the demand of
Motion Picture Stock is realy low today - with 65mm film it is extreme low!
But that what you have a need of is "just" a question of conversions !
Theoratically that ALL IS POSSIBLE - well if this word "JUST" not were

= "just" a question of conversions!
I guess if you would like to buy 500ft AND 1000ft rolls you have the need to yourself - right?

So we are speaking not about a real mass of that rolls you have the need of?
Or are you have ambitions to sell this stuff? Are you planing to make a start up ? Beside the need for your own? This is a real question because I can imagine that there are a lot of people out there
wich would buy but it isn't avaible!
Well from my point 120 films in big rolls should be possible (just if the demand to 120 Ektachrome is generally high [that seams to be so at this point] but they we would speak about 30m rolls!
You perhaps would be the only person in full Europe who demand 120 films in 500ft/1000ft Europan? And at last you are missing the cut to 65mm AND perforation ISO 3023...

!
At the end there could be a chance that you indeed get 120films in 500ft /1000ft = special order
cut direct from 120 masterrols. It isn't impossible (cut before conversation machines making 120lenght with backing paper) but conversation to 65mm ISO 3023 with Ektachrome would not be make if Quentin Tarantino would decide to shot next film from positive 65mm!
And he of course would have the need of a little mass 300ft /1000ft ....hmmm?
OK may be Quentin Tarantino would get his rolls (what ever it cost) because that would be a great
thing (shooting positive 65 mm cinema)?
But at the state of this day there is obviously no chance about! I guess it can be the same
to Film Ferrania!
with regards