Help! Need A Thumb Break Holster Pattern (S & W Ve9)( Similiar To The Bianchi 7935 Speed Break)

[toolleather]

Hello Everyone, I received a request to make a replacement holster for a Smith & Wesson VE9. Now I've never made a holster before, so this will be my first one and I want to do a great job, but I can't seem to find any patterns for a thumb break or this model on line. I'm wanting to do this in either an Avenger type holster or the (pic) link down below. Any Ideas??

Thanks

This is similar to what I would like to make: http://www.warriordepot.com/bianchi-7935-speedbreak-holster-black-size-13-right-hand-md-22900/