Ok I have just Got a DX4S
But i need a Case/Bag for it all i can find are ones for the DX3

Also were can i get a different wheel as i'm not keen on the Foam and prefer a rubber one
I no there was at one point replacement wheels for some transmitters but i can not find them any more

For a case, you buy this and then put it in the case itself that they sell separately.

Hopefully, someone else can point you in the direction of a new wheel.