Are there any third-party network adapters with actual networking?

Pretty much what the title says. All of the ones I've seen are HDD-only; I tried to swap the SATA subboard from a third-party one with the original Sony one; while the flatflex had identical pin counts and shape and fit snug as a bug, the storage controller just simply didn't work. I did this (probably a decade ago?) because I wasn't wanting to wait around on a proper SATA conversion kit to come from China to get results of any sort.

I want SATA + the ability to use the network without modifying an original Network Adapter.

(For what it's worth, the Network Adapter is a CardBus/32-bit PCMCIA accessory with a 16550 UART, a RTL8139 NIC, and a standard IDE controller, all hanging off the PCI bus. RTL8139 chips are ridiculously easy to source. The SATA-based hard drive devices are already handling SATA-to-IDE conversion and the CardBus protocol. Surely there's no reason one can't have Ethernet.)