| The earlier 600/750/900 bars are steel ones that are fixed below the yoke on those models, although they have a huge riser on them which makes them sit quite high. Both the earlier forks are 50mm diameter at the top so they would fit your bike.
There are other alternatives out there although probably more costly like Helibars, Robby Moto do some clipons that aren't to steep and I have had Spondon make some for me in the past with a very shallow angle. FBF do shallower bar clamps for the 916 models so may also do them for the 620 sport.
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