I believe you can simulate the behaviour by storing the original seed, and the number of times you called rand. A crude example (just so you get the idea):

use strict;
my $savedseed = 1234567;
srand $savedseed;
my $savedct = 0;
my $rnd;
foreach (1..5) {
   $savedct = $_;
   $rnd = rand;
   print "$savedct: $rnd\n";
}
print "\n";

srand $savedseed;
foreach (1..$savedct) {
   $rnd = rand;
   print "$_: $rnd\n";
}
print "\n";
print $savedct+1, ": ", rand, "\n";
[download]

which produces:

1: 0.03509521484375
2: 0.139495849609375
3: 0.08056640625
4: 0.35931396484375
5: 0.123077392578125

1: 0.03509521484375
2: 0.139495849609375
3: 0.08056640625
4: 0.35931396484375
5: 0.123077392578125

6: 0.814605712890625
[download]

HTH

--Jim

Update: Capitalizing on the fact that "srand $seed" will produce the same sequence of numbers as long as the same value for $seed is used. See srand and seed for more details.