I recently found this Newman's Own brand frozen pizza that's imported from Italy and only uses extra virgin olive oil. It's available in regular supermarkets where I live and is a very rare exception to what you said about all frozen foods using bad seed oils:100% of frozen/processed foods have them (no surprise there) - so just avoid those by default.
Recently I bought 3 packages of of corn taco shells, which are generally made with palm oil (which is okay to eat)
It's delicious too. Really tastes like an Italian pizza. Interestingly enough, the frozen pizzas from the same brand that are made in the US use canola oil. I'm sure you're not surprised.
Could you give me a tl;dr on why you think palm oil is OK? I've googled it a bit and it's controversial. One of the supposed cons seems to be that it's high in saturated fat, but I personally don't think saturated fat is bad for you. For example, per PD Mangan's advice, I've been eating all the butter and cheese I want for years and so far it seems like it's working out for me.