Yep, Ted tiny umbrella man.
If he doesn't have them and you can't otherwise find them, here's an idea I've had stowed away in a dusty back corner of my head for years for a relatively easy to make DIY alternative option:
If 10-3/4" diameter is large enough for sufficient coverage, you can adapt a Ultimate-Frisbee sized flying disk (because it's generally the largest standard diameter frisbee) by drilling/cutting a small hole in center to attach threaded rod secured with wing-nut on top, other end of threaded rod attaches to mic-bar or light stand top thread/spigot adapter. Even simpler- if you clamp your mics to the stand rather than attaching them at the top, you won't even need the threaded rod.
Cool options:
1) You can offset the hole instead of placing it in the center to provide more overhang toward the front if that helps center the mics beneath the 10-3/4" diameter disk.
2) Can easily throw a rag, washcloth, or better- a circle of open cell filter material on top (also secured by the wingnut) to break up droplet impact and help quiet rain noise.
3) Could insert something acoustically absorbent on the underside to further reduce of rain impact noise from above and reflection of sound from beneath.
4) Still works as Frisbee (as long as options 2 & 3 aren't permanently attached) when its beautiful out and the sun is shining!
https://usaultimate.org/wp-content/uploads/2020/11/Disc-Technical-Drawing.pdf