2012 uses a 3 point, which is their "standard" bridge across all bass models for most part.
Original G3 had the bentplate/string through body only option, & yeah aftermarket replacements are far & wide to find. like this one,
https://reverb.com/item/75246456-gibson-grabber-g3-style-replacement-bridge-vintage-nickel-finish.
Otherwise, any other aftermarket bridge you'd need to drill new holes into the body to use it, since most are fender screw hole layout (5 screws for most, 3 screws for their MIA bridge types which allow string through body).