'14/'15 Foremans are liquid cooled, EFI, have front diff lock, 475cc, available EPS, and a solid rear axle.
'15 Rubicons are liquid cooled, EFI, have front diff lock, same 475cc, available EPS, and IRS.
The new Rubicons are available with two transmissions. The DCT auto with a sub/low range, or a manual transmission.
Choose the manual transmission and, voila, a Foreman with IRS.