[R] TRAMO/SEATS and x12 in R

[Victor]

I have a Mac OS X system. To deal with a long monthly electricity demand time-series I use the  procedures TRAMO/SEATS with the MS-windows only Demetra programme and X12 under R resorting to the awkward - as far as the output is concerned - x12 R package running the relating Fortran code. 
I wonder if someone out there has attempted to translate TRAMO/SEATS and X12  into R native language?

Ciao from Rome
Vittorio