I just spotted a front bumper mounting kit (actually for a CJ) on
www.megastore4x4.pt but it may adapt and would undoubtedly be cheaper in the US.
It is shown under 'Accesories Diverse'
Mounted as shown would not be legal in Spain but maybe okay in the US.
I am looking for these mountings too, as currently my hi-lift travels inside but I would need to modify my LH mirror arm if I went the step mount as we live in a narrow street (I fold that mirror to access). Similarly I don't have my spare mounted on the rear as it would stick out too far (same reason). The bumper option may work for me but I'd need to mount it on top of the bumper.
Regards,
Rodger