too late this seller only has 1 left it seems
http://www.ebay.com/itm/1966-1978-Kawasaki-A1-A7-S1-S2-S3-KH250-KH400-Trans-Needle-Bearing-NOS-92046-005-/151535030168?hash=item2348310f98:g:c1AAAOSw7ThUoxtz&vxp=mtrPerhaps a search by model number and part name would bring more results?
Good Luck
Part part number = 92046-005
Part Description = NEEDLE BEARING
Model Count = 14
A1 N/A 250 SAMURAI DUAL PURPOSE
A1R N/A 250 A1R STREET
A1SS N/A 250 SAMURAI SS DUAL PURPOSE
KH250-A5 76 250 KH250 STREET
S1B 74 250 S1B STREET
S1C 75 250 S1 STREET
A7 N/A 350 AVENGER DUAL PURPOSE
A7SS N/A 350 AVENGER SS DUAL PURPOSE
S2 72 350 S2 STREET
KH400-A3 76 400 KH400 STREET
KH400-A4 77 400 KH400 STREET
KH400-A5 78 400 KH400 STREET
S3 74 400 S3 STREET
S3A 75 400 S3 STREET