Please Please Me! Offer the McCartney bass instrument separately!
It was definitely a smart move, business-wise, to put the most "signature-looking" and unique-looking of the signature guitars exclusively in the kit, because I am sure a lot of people reluctantly bit on the full kit *just* to get that bass.
How about at some point doing something for the rest of us who really would like it, but just couldn't or wouldn't splurge on the whole kit to get just the one item? Most of the kit is really redundant for many, and I think most would agree that aside from the bass, the peripherals in the kit are ho-hum. For my part, the only bits I needed were the game (already bought now, so scratch that) and a 2nd guitar (have a 2nd but it is a 3rd party job that isn't very good, frankly).
I could do the EBay thing but it's just laughable to see what people are willing to bid these things up to at this point. I don't need a plastic game peripheral quite *that* bad....