Kollage Square Circular Needles is a similar needle: circular and US 11 (8.0mm) US size. You make also like Clover Takumi Velvet Circular Needles, which is another similar needle: 29" and circular.
You may enjoy taking a look at the Berroco Elements Capricia Cardigan, Berroco Comfort Autumn Haze, and Tahki Montana Felted Eco-Tote kits all using Clover Circular Needles.
If you like Clover Circular, then you may be interested in the different ways we've used them. Visit our Go Green! and Hat corners to see some ideas.