For OEM either Dealer or BikeBandit and used on Ebay. The ones above that lovecuba is showing are the Kuryakyn need adapters from them as well to install on our bikes.
One other option is Autocyclers. This m/c graveyard has about 1,000 motorcycles for salvaging. They have two Legends that I know of (same as the TB but sportier). I have bought parts from him before - he's a super nice, honest guy. If he has the part you need, he will ship it to you. http://www.autocyclers.com/
i have those pegs fitted to the rear on mine and as slinky say they bolt right up just be carefull you dont lose the small ball bearing when taking the old ones off triumph charge arnd £1.50 gbp for replacement bearing or as said b4 check out e bay