I think you might struggle with this one.
Most open enders are relatively short, reflecting the likely torque.
With most wrench manufacturers offering three, or even four, lengths of combination wrench (and probably feeling uncomfortable about the open ends on the extra long) I can’t think of any offering a long “DOE”.
Historically, it’s a different matter. Blue Point used to offer some very long tappet wrenches, in both single and double open end, but for access rather than leverage
I think the double open end were part of their “supreme” line, and I can’t remember if the standard thickness DOE’s (of the same line) were longer than normal. I have it in mind that they were.