This seems like it might be a good place to ask: does anyone know of a low-cost, readily-available SBC box with built-in dual Ethernet interfaces?

I've been very interested in some of Radxa's boards in the ~$30-70 range, like the E52C [0] and the E20C [1], but they don't have many distributors and seem to have stocking issues [2].

[0] https://radxa.com/products/network-computer/e52c/

[1] https://radxa.com/products/network-computer/e20c/

[2] https://shop.allnetchina.cn/products/radxa-e52c?variant=5034...