ATI PM hanging cable replacement

[Allmost]

Hello,
anyone know where I can get a replacement cable for the hanging kit ?

the long cable hanging from ceiling is ripping off due to me moving the fixture up and down too many times .... where can I buy replacement ? any Ideas ?

I know Home depot sells the cable ... but the ATI one has a little notch thing at one end that gets stuck to the top part ... the ones at HD dont have that ?

any opinion ?

thanks