Here's what I can come up with;
Dwyair Air Charter, Mason City, IA shows 2 E-18s in the fleet.
Freight Runners Express, MKE shows 1 E-18.
Springdale Air Service used to have a bunch, but are they still around? Heard they went away...
Miami Valley Aviation, Middletown, OH shows 3 E-18s.
Tolair Services, San Juan, PR has 5 of 'em.
Gotta be a few more here and there I'm sure...
Dwyair Air Charter, Mason City, IA shows 2 E-18s in the fleet.
Freight Runners Express, MKE shows 1 E-18.
Springdale Air Service used to have a bunch, but are they still around? Heard they went away...
Miami Valley Aviation, Middletown, OH shows 3 E-18s.
Tolair Services, San Juan, PR has 5 of 'em.
Gotta be a few more here and there I'm sure...