I've long hunted for split flap modules on aliexpress and I know folks who buy old train boards to get these modules. I wonder if there's someone out there scal

I've long hunted for split flap modules on aliexpress and I know folks who buy old train boards to get these modules. I wonder if there's someone out there scaling up the manufacturing? I'd love to buy modules at under the DIY ~$50 mark and build cool stuff at home!