Here is a used pair of Honda (Showa) rear shocks from a 1980 CR125R, approximately 16" center of eye to eye length, shaft diameter is 1/2", 10mm mounting eyelets.  The chrome on the shafts looks good, no rust pitting, the seals are weeping and will need replacing, the rubber bumpers have weathered away and will need replacing.  Free shipping to the lower 48 states via UPS or USPS.