The 1000 Series Original is the Korean-made version of the Original Tremolo, made to the same specifications and materials, but is available only to guitar manufacturers and can not be purchased aftermarket except for the Burnt Chrome finish 6-string and the 7-string version. 

Parts for the 1000 Series systems can be found here.

The 1000 Series Original can be found in both 6 & 7 string versions.