Recommended weather-sealed zoom lenses for professional Sigma fp L setups?

Does anyone actually have a solid recommendation for a fully weather-sealed zoom lens that doesnt feel like a toy on the Sigma fp L? Honestly im so fed up with my current gear situation because I keep getting moisture alerts or just straight up panicking every time a single drop of rain hits my setup and it's driving me crazy. I love the sensor on this thing, the 61MP is incredible for my landscape work, but the lack of clear info on which zooms actually survive a beating is making me want to sell the whole system and just go back to Sony or something even though I hate their colors.

I have a huge gig coming up in three weeks out in the Olympic Peninsula—if you know that area you know it’s basically a giant rainforest—and I am genuinely anxious that my kit is going to fry on day one. I've been looking at the Sigma 24-70mm DG DN Art but I’ve heard mixed things about the sealing around the zoom barrel, and some people say the dust gets in there way too easily which is a nightmare when you're shooting professionally. Then there is the Panasonic Lumix S Pro stuff but they are so massive it almost defeats the purpose of the tiny fp L body, but at this point I guess I don't care about the size if it actually works.

My budget is around $2500 for a solid workhorse zoom, maybe a 24-70 or a 24-105 range, but it absolutely has to be able to handle mist and heavy humidity without me having to wrap it in plastic bags like a total amateur. Is the Leica Vario-Elmarit worth the insane price jump for the sealing alone or am I just overthinking this? I really need something that won't fail me because this client is a big deal and I cant be the guy whose camera died because of a little drizzle. Are there any L-mount zooms that you guys have actually put through the ringer in bad weather?...