Yeh I noticed these too when hunting for the iGear "Arcee" on BBTS. at $70US I can't justify having them, despite being a huge series 3 G1 fanatic.
Spent a bit of time looking at iGear vs Impossible toys take on arcee - I must admit the iGear design does her G1 character more justice. Haven't been able to find one for under $100US though, so I might give it a miss.
I'd pounce on a third party custom based on the G1 prototype though
http://tfwiki.net/w2/images2/5/58/G1ArceeProto.jpg