Best Foam Inserts for packout drawers?

Hey everyone. I’m sure this might be in here somewhere but I couldn’t find it. I want to do foam inserts for all my packout drawers, but the ones that Milwaukee sells are insanely expensive for how many drawers I have. Is there a cheaper option that still has the pre cut tear away cubes? I think I’d prefer that over a solid piece of foam that I have to manually cut. Lmk!