The sad thing is that nothing really replaces Tapu Lele GX for what it does - the ability to grab any Supporter you want, and it's an extremely powerful ability at that. Depending on your deck, you might not even have the room for an Octillery line, though Octillery itself doesn't necessarily mean that you get the cards you need at any one point.
If you can't afford Lele, though, then your only options really are to just try to draw as much as possible, and Oranguru and the Octillery you mentioned are pretty much it.
Expanded may be a better choice if you have a bunch of the cards from it, as it isn't nearly as reliant on Lele.