Zyprexa Relprevv is kind of a pain in the arse because you have to stay there for I forget if it's one or three hours after the injection to make sure you don't have a severe reaction that's somewhat common (delirium). A lot of prescribers don't even touch it because of that. And if oral olanzapine doesn't work for you the injection won't either as it's the same thing just with some extra ingredients to dissolve the medication in (which is what can cause the reaction).

Other depot medications don't have as much of this risk (although I did get it from Risperdal).
I'm not sure what the equivalent would be, but you're already maxed out on the Zyprexa dose so whatever the highest Relprevv dose would be would be your dose.