Need help with Carbide saw for Stihl FS 310.

[slapshot1183]

I'm looking for a Carbide circular saw blade for an FS 310. Stihl carbide blades are only available in Europe and Stihl USA is unable to import them for whatever reason. I'm cutting alot of saplings <2" near the ground and the chisel tooth blade from stihl wears out a little to fast in my opinion.

http://www.stihl.co.uk/STIHL-Produc...-28093/Circular-saw-blade-carbide-tipped.aspx
Does anyone know if I can find a carbide blade for this brush cutter and who makes the best one? Are they worth it?
Your help would be much appreciated.