Bloody hell, made in Thailand for 20 odd dollars. I nearly spend that on Argon & filler rod.
Mine are priced at $880.00 including GST. Requires standard TT / XT pivot bearings & YZ chain adjusters.
I based them on the HL banana arm and just changed the pivot section & shock mount positions to suit the standard frame, they are around 50mm longer than the stock TT / XT.
The White Bros looks a good unit, the Thailand one looks neat but the geometry looks the same as stock, & mine are expensive by comparison but I believe the geometry to be good, The RM / PE is a good alternative but I was led to believe that they are about 100mm longer than stock which is a bit much, not sure if their is a particular model that is a good length for them
Just depends on what your looking for.
I will get a decent camera one day.