##Shell 68
###tools: bc -l, tr, cut

    echo "scale=2468;obase=16;4*a(1)"|bc -l|tr -d '\\\n'|cut -c1027-2051

###Shell 64, tools: bc -l, tr, tail, differs in the rounding of the last place

    echo "scale=2466;obase=16;4*a(1)"|bc -l|tr -d '\\\n'|tail -c1024

Might be considered cheating, since the knowledge how to compute PI is in 4*a(1), and that 1 have to use scale=2466 was iteratively investigated.

Thanks to breadbox for the idea to use cut.