It's my cousins birthday next month and his favorite muppet is Rowlf. He is quite simple in design but one problem, his nose. I have no idea what to use for his nose. So if any of you have any suggestions I would appreciate it very much.

It would not be the exact shape of Rowlf nose but you might be able to find a rubber kids toy ball that would work.  You might be able to find an oval pre-formed styro shape at the craft store that you could then cover with a thin layer of paper mache' and then cover that in black tool dip you find in the hardware store.

You could also sculpt crayola model magic around a smaller 24mm doll joint and then just attach by snapping it in place.

Ohh.... good idea Billy!  That would be the perfect solution!  I just keep forgetting about Model Magic and forming it over a doll joint gives are really secure way to attach it to the head.

I thought that everyone attatched facial features like this using dolls joints, i also use the plastic nuts and screws that are usually used for registration plates here in the U.K. I would go for the plasti-dip idea, or 'liquid wipping' that you can find at a chandlers, its the same thing but usually used to seal the ends of rope on boats, i would make the nose shape out of foam or polystyrene and then coat it in the plasti-dip or liquid wipping a couple of times and you will have rowlfs nose!!!
good luck and keep us informed of the progress,
Ben.

I actually remember reading that his nose was made out of wood and dipped?

You could also use a 45mm or 50mm oval craft eye sculpt the nose out of foam then  glue it to the eye. Dip in plasti dip or cover with a vinyl coated fabric. Attach with the back fastener

Well I have a few doll joints and a ton of animal craft eyes so I'm good there. I ended up making the nose out of model magic and I got some spray on plasti dip to cover it. I had a hard time finding the right kind of fur but I found some that was close enough. It's not as shaggy as the real Rowlf and more like sheep's wool but I don;t think he is going to care or notice. Plus at $10 a yard it was a steal.

Been working on and off for 3 hours. Here is what I have done so far.

Looks like you are on the right track!