I don't think so Dr. If I looked at the same thing as you-they have clamps for 39mm, 41mm, and 49mm. The America diameter, with the shrouds is close to 60mm.
At this point I'm leaning to go with the piece from Ma's. Reading up on lowering the forks gives me pause from a riding stand point. I might be more inclined to do it if I was going to lower the rear end as well.
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