Linksys EA7300_V2 is in current and I was able to pick one up re-certified for ~$40USD.
The Cudy WR1300 is currently on Amazon for ~$30USD w/ free US shipping. There is a downloadable build and it looks like patch submission is in the works:
https://forum.openwrt.org/t/cudy-wr1300-support/67593/151
The Cudy WR1300 looks to be an easier flash than the Xiaomi and does not have the shipping issues.