If you’re looking for SME tonearms, try Alfred Kayser at https://www.smetonearms.com
Alfred apparently stocked up when SME announced they would no longer be selling their tonearms separately. I picked up a new in box M2-9-R for my Gyrodec. He also will re-wire and upgrade bearings for the tonearms he sells.
I enjoyed doing business with Alfred and am very pleased with the M2-9-R.