Right now the best long handle looks like the "Fallen", though another option is to pick up an extension. Some folks have built some nice long-handled sabers using Yari extensions or for something in the 3.5 to 4 inch range there are some nice extensions on TCSS website.
I don't know if you can get the "grenade grip" section of the Arbiter saber from US but it also makes an EXCELLENT extension.
A third option would be to acquire a v2 staff coupler and an Initiate V2 to go with your Aeon, just put a blade plug in the Initiate instead of a blade for single-blade use.
There are many options. :-)
I will send a link to TCSS via PM...
And for some idea of what that might look like... An Initiate V4 LE with a TCSS extension:
Or a flush coupler plus small TCSS double-female adapter and Dark War Glaive pommel on an Initiate V3
did I mention I really like the Initiate v3 and v4? :-)