I'd forgotten AGI bought Batco. Looking at the parts diagram it appears that's only available from AGI Batco as an assembly.  I'm going to have to go look at my 1535 because it says I have the same part and I can't get a picture of it in my head.

EDIT Well, it appears a direct link to the parts page doesn't work  I guess you have to log in as a guest and then find your  way.
Also found this https://www.aggrowth.com/globalassets/brands-section/batco/support-literature/fx-series-parts-manual.pdf