I believe his flag tells us he's from Slovenia, the 800 number probably doesn't work for him.
The other bar is 18" 58 gauge, but I'm not sure how to decipher the fitment code.
A photo of the tail with the bar slot, adjuster, and oiler holes would help. Check the width of the slot to see if it fits 5/16" (8mm) or 3/8" (9.5 mm) bar studs.
Mark