The Tarmacs aren't discontinued. I see alot of the vendors on I-Club claiming certain styles, or certain colors of Rotas are discontinued, and then they turn around a few weeks later saying they just recieved new shipments of wheels that were supposedly "discontinued". This happens all the time, and alot of times folks rush in thinking they are getting the last of a kind, or a limited edition. These vendors remind me of used car salesmen.
Tip: Often a vendor will tell you something is "discontinued", it is his way of saying he is out of stock, and he hopes you will buy another style/color he has in stock.
Oh, here is a thread with a reply from one of the owners of the Rota company. Check out his response.