Find and install old package to R 2.11 in UNIX

Hi, I'm having trouble installing and using the 'foreign' package in  
R on a
UNIX machine.

sessionInfo()

    R version 2.11.1 (2010-05-31)
    sparc-sun-solaris2.10

    locale:
    [1] C

    attached base packages:
    [1] stats     graphics  grDevices utils     datasets  methods    
base

Is there a way to find and install an old 'foreign' package that  
works with
my machine?

Does such a method generalize to finding other out-of-date packages  
for my
machine?