Bash One Liner: copy template_*.txt to foo_*.txt

Say I have three files (template_*.txt):

• template_x.txt
• template_y.txt
• template_z.txt

I want to copy them to three new files (foo_*.txt).

• foo_x.txt
• foo_y.txt
• foo_z.txt

for f in template_*.txt; do cp $f foo_${f#template_}; done

or

for file in template_*.txt ; do 

  cp $file `echo $file | sed 's/template_\(.*\)/foo_\1/'` ;  

done