That’s a serious conundrum. You’re stuck in historical scale with an aesthetic that historically didn’t use the weapons you want to use, so you’re going to have to mix and match with limited items to use for conversions. Here’s your best bet:
you’ll get 36 hand weapon and shield arms to use with your pike and shot plastic landsknechts.
What i’d do if I were you is buy as many boxes of the pike and shot plastic landsknects pikemen and zweihander infantry as I need to flesh out all of my infantry, then I’d buy as many Fireforge men at arms boxes as I’d need to make my units of swordsmen. If you don’t intend on using spears on any units it’s going to be pricey (but still cheaper than GW). What you need is for someone to make puffy arms in plastic, and I don’t see that happening. You might be able to find some ancient empire infantry on eBay though, and those old Perry minis will be very close in scale to your warlord minis.
Seems like people here are more for using what is available rather then creating a solution to a rather clear issue EoS players have.
I may even resort to making my own arms.