I love your bag and pouch! If you need larger swivel clips go to your craft store, such as Hobby Lobby, and look in the leather tools section. Also go to www.tandyleatherfactory.com
and look for the hardware there. I just bought swivel clips for a healthy back (ergonomic) sling bag I'm making and I got them at our local Ben Franklin's in the leather crafts section. Hope this helps!
MORE: I just ordered different sizes of the swivel clips from www.seattlefabrics.com
along with key chain swivel hooks, d-rings, etc. for the bags I'm planning on making. I've ordered from them before so I know they're good on shipping and service.