Help me identify this seat missing backrest

[Motörhead]

I'm taking it to the upholstery shop for a height/width reduction and recover and would like to find the backrest that fits in the slot behind the saddle. It has been recovered previous so there's only the upholstery shop sticker underneath no manufacturer branding. I searched around for Corbin but came up empty.

 

[claydbal]

flip it over and it probably has tag. looks like a diamond.

 

[Motörhead]

flip it over and it probably has tag. looks like a diamond.

That's it! I'm shooting them an email to see if they have a backrest that'll fit. Thank you sir.

 

[claydbal]

good luck!