Roger, while you're sourcing parts, can you find these bearings?
I pulled the throttle quadrant apart this morning and found 6 (!) HK0810RS bearings- 3 pairs in each of the linkage pieces:
The throttle quadrant bearings HK0810RS are $13.50 each.
The roller bearings in the throttle quadrant:
INA HK0810-RS-FPM-B-L271 8mm Needle Roller Bearing, 12mm O.D
HK0810-RS SKF Sealed Drawn Cup Needle Roller Bearing 8x12x10mm