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Gen 3 has a redesigned knuckle which is how they got more travel out of the same shock. Gen 2 won't fit unfortunately. OP I think that's a dealer question, I doubt the aftermarket has caught up to provide OEM+ knuckles.Are you sure the Gen2 knuckles don't fit?
You might try the big Raptor off-road shops, SVC, RPG, SDHQ, etc., etc., etc. They might have a pair of gussetted ones.