Greetings,
OPA134PA would seem quite similar, and is currently available. It does have offset trim pins which the reference device omits, which may or may not be a problem depending on what the application board does with those pins
Absent an understanding of why the original part was chosen, making an “optimal” selection is nigh impossible. At the same time it’s not always a big deal. It seems likely that this could be one of those situations, but it’s impossible to know based on the info available.