The only difference between the Trico 43 and 44 is that the structure is metal vs plastic, correct? Worst case I guess you could get a 44-190 and cut them to 13".
According to the Trico 'catalog' the 44 is for a plastic framed blade. No dimensional info posted. https://www.tricoproducts.com/products/wiper-refills 43 Series steel wiper refills are designed to refill both TRICO and Anco long frame metal blades. These natural rubber refills feature a steel vertebra, and are designed to fit TRICO Exact Fit® and TRICO Classic™ blades, as well as old Anco 25 Series blades.
Features and benefits:
Designed to refill long frame metal blades
Wiper refill size – available in lengths from 13" to 22"
44 Series universal wiper refills are designed to fit most long frame plastic blades. Designed with metal end clips for secure, easy installation.
Features & Benefits
• Plastic backed refills fit TRICO, Anco, Pylon, Roberk, Tridon and Original Equipment plastic blades
• Wiper refill size – available in lengths from 13" to 24"
The only real clue is the word 'narrow'
As far as I can tell, 43 is for the original Trico blades, and may also work for the Anco blades (using the clip).
The Anco PB inserts are 0.380 wide.