I used to have this:
I'm fairly sure I don't have this ballast anymore. But it isn't impossible it found its way into a storage box rather than being disposed of... I have a box filled with fluorescent ballasts and I no longer remember precisely what's in there, I need to check again LOL.
It's not specifically an Advance HB-234-TP, granted LOL. If you're looking for other dual-lamp NPF ballasts as well, I can check whether or not I still have this one.