This SME M2-9 would fit the bill.
http://smetonearms.com/index.php?main_page=product_info&products_id=79
There is a seller on Ebay that sells SME armboard plates for Technics tables!
http://smetonearms.com/index.php?main_page=product_info&products_id=79
There is a seller on Ebay that sells SME armboard plates for Technics tables!