http://www.sharecg.com/v/52439/View/11/Poser/BikerBoots-M4

http://www.sharecg.com/v/52521/View/11/Poser/FurKiltSkirt_M4

http://www.sharecg.com/v/29628/View/11/Poser/M4-Hat

http://www.sharecg.com/v/51674/View/11/Poser/Overall-M4

These are just a sample of 10 pages brought up doing a search for "poser +M4"

FYI,  M3 clothing will work on M4 if you want to take the time to make them work.  Its not all that hard.   Take the artical of clothing into setup and then bring up your library and click on the cr2 for M4, this will put his skeleton on the artical of clothing.  Do a few adjustments, auto assign groups and you should be good to go.  If auto assign doesn't work then you will have to mannualy assign the groups.  But either way you can get the cloths to work.

You shouldn't get mad because you can't find all the free items you want.   The creators of these items would like to recoup their time invested in making them.   People like you and me have to be creative when we can't afford the best things.  Poser, just like in real life if something doesn't fit, you have the choice to throw it away, or adjust it so it will fit.   Thankfully there are people who share with us, so it is up to us to make good use of what they share.