Data-Linc Group has a device called the NET620 which is a replacement for the NET-ENI except that it only does the DF1 to EtherNet/IP bridging (no Emails, etc...). It's not listed on their website anymore but I know they still sell it. It's drop dead simple to setup and use and it's priced lower than the NET-ENI's were.
I was in charge of the development of the product that spawned it (which was an Ethernet radio modem that supported the bridge function) and the NET620 itself and I'm very customer service oriented and held very high standards to the development. I also had a couple of great engineers working for me on the project so I can speak first hand to how good the product is. Having said that I haven't worked there for a couple of years now but I don't believe they made any changes.