This was the PENTA,got this one off another xt, we have an exhaust maker here in Durban who can make similar for around R3k,let me know if you want contacts.
Would suggest you try Westmead if you have not already, take the Giba Gorge road and about 400 m from the cycle trail park entrance take the left up to the quarry where you can practise .The road up to the quarry itself is a good d/s track.