Yes, I'm looking for spending_signature_hex. Sorry about the mixup.
I'm currently running this:
for day in `ls inputs/*gz`; do echo $day; gunzip -c $day | cut -f7,8,18 | grep -v spending_signature_hex | grep pubkeyhash | grep -vP "\t$" >> output2.txt; done
If it doesn't run out of disk space, I'll continue from there tomorrow.