We don’t exactly have any vendors that are always recommended (even actionflex makes some weapons we wouldn’t use). Oddly, Calimacil is one of the more reliable ones.
Most commercially-made latex weapons are good (though, because of their construction, you either need to be extra careful, or not thrust, depending on the weapon).
Calimacil is actually built for thrusting, so it tends to be OK on that front. It’s just much heavier than its padding really accounts for, in a lightest-touch game — I still wish they would embrace some ultralight techniques and build weapons with hollow cores, for example — so they just tend to hit hard, and you get tired (thus less safe) more quickly. Just like with latex, you need to be careful, but for different reasons.
When I say “built for thrusting” I mean “designed to thrust without risking the core piercing through,” which is often a risk with latex weapons. Any rigid-ish weapon can knock the wind out of someone on a thrust, and the heavier it is, the more likely. Actionflex gets around this by some clever progressive flexing.
For a two-handed weapon, any brand will require some safety, because you’re putting that much more of your body behind it, and the tip is moving that much faster (because of weapon length). If you want something that you worry the least about, go with an actionflex staff (the “bo staff”). But it should be possible to fight safely with even a calimacil two-hander. Practice, practice, practice.