I used the $chr(9) $+ +fs to tell it where to stop so if thats not constant than this isnt a good solution.
I came up with $gettok(LINE,6 $+ - $+ $calc($findtok(LINE,$chr(9) $+ +fs,1,32)
So, to see an example type:
//var %tmpline 0 +fs 1 0 0 C:\Program Files\COMODO\Firewall\cfp.exe +fs 0 0 0 344 +fs 0 0 0 1.71MB | echo -a $gettok(%tmpline,6 $+ - $+ $calc($findtok(%tmpline,$chr(9) $+ +fs,1,32) - 1),32)
This was just the first solution that popped into my head so let me know if and why it won't work and I will try again if needed.