here's a tip for posterity:
a bass brige pin typically has a bridge hole diameter of roughly 5/16" (.031")
most acoustic guitar end pins have a 'B' dimension (see image below) of .30" - .32"
so it seems quite likely that an ABG can utilize a standard end pin to replace lost/broken bridge pins. suddenly the sources for ABG bridge pins are quite numerous
if this is incorrect, I will post a follow-up noting this
all the best,
R