Hi: I'm unclear, what is a " II Gen 1"? I know there's a Gen1 bike (first generation 2001 to 2005) There's a Gen2 (second generation bike 2006 to 2012), and a Gen3 (2013 to ???).
To solve your issue I thought you'd be looking at Gen1 bikes alone. You could swap the side panels and be done with it. If you're looking to swap just the signals, I'm pretty sure you can't just retrofit them, the panels are different in that respect. I don't know that you could swap in a Gen2 signal either.
If'n it were me, I'd either swap panels (**** change the color is you want silver and blue) or look for an after-market signal that you like.
That's my $.02, I'm done.
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