If you register at Vinyl Engine you can download the service manual for the SP-10 Mk2, and hopefully for whichever model you have for the Obsidian plinth (they made three). Those should identify pitch and size for all screws, then it is only a trip to a good hardware store or on-line source.
And no, about the only thing for any SP-10 at KAB is the Technics bearing oil.
And no, about the only thing for any SP-10 at KAB is the Technics bearing oil.