The San devices e680, e681, and e682 support multiple pixel node types and use the same e1.31 Ethernet protocol if using a PC to run the show. There is always a trade off in capabilities and how they have to be deployed. I'm sure there are other options available as well.
As far as DLA goes, the only pixel types we currently sanction are those found on the wiki.
Just saying 1804 chip is not enough as you need to specify voltage and speed to make sure you get the right ones...