Where are the big targets available ?

The ones I've see are either 2x3 or 3x3 feet?

I need something like them for my shop.

I know ********* Archery sells them. I have the 4'X4' model. I bought it at a local pro shot at least 8 years ago. It is getting pretty worn out now, but has had an incredible life.

I have 3 of the 4x4 blocks. The local shop shoots them 3 months per side on their indoor range and then sells them for around $200-250. They still have plenty of life left in them too

If you like to DYI try this
 http://archeryreport.com/2011/04/diy-lifetime-archery-target/  
And no the chick wire will not hurt your arrow they have steal tips(not for broad heads)great target but heavy       I built mine 4 wide and 5ft tall( 4 blind bale shooting and should cost less than $40, you can get filling at goodwill/church sales)