It has the contact info and the price of the pipe with shipping. As far as I know you have to order the pipe straight from SPP. I am unaware of a US distributor.
They have both a muffled and unmuffled pipe to suit this motor, pictures may not be on website yet. Send them an email telling them what you are after is the best way to go
The pipes are definitely available, they just are not on the site yet as Jeremy has been busy with some other stuff. Send him an email and you will be sorted