amazon.com/138F-Sliding-Bypass-Hardware-System-x/dp/B008BUXTUE .

amazon.com/CRL-134F602D-Door-Passing-Hardware/dp/B00QL5FQVQ

138 is for 1 3/8″ doors; 134 is for 1 3/4″ doors

Order from Jeske/Johnson with the following numbers (note door thickness, length, color, and weight rating).  Pictured below is Jeske’s prices. Jhusa.net may be cheaper:

If ordering for only the 125 lb. weight rating, order the 1125, to upgrade to the 200 lb. weight rating.  You will need 2/slab.  (So for ONE 2-door system, you would need quantity of 4.)