Since you had the Forge gear knob(assuming that you still have it in your possession). Perhaps you can test and see if it will work with Boomba’s shift lever.43720-S0100 i30N Part #. 43720A
43720-K9000 VN Part #. 43720A
I'm going to say yes, considering the approximation of the pictures and have the same part code. The part numbers are not the same but I can pretty well guarantee they are identical as they can be.
Look for yourself thru the two links but I'm almost certain.
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