HSM motor for sigma

[Yisehaq]

My sigma 70-300 APO DG 4-5.6 gave up autofocusing. From my inspections, I think it's the motor that has blown out. Is there any website where I can buy this motor? I couldn't find it on the regular photo equipmenet sites like B& H adorama etc.
Thanks

[edG]

I suspect you will need to send it back to a Sigma repair depot.