Yeah, I would make one, but the custom Arduinos that I use only have the normally required pins to keep them small. A pro micro will work. A pro micro mounted inside of the DC2014 would be the least amount of work, but transplanting the switches into another board is also a good option. DC2014's are viewed by many as being best for switch donors since the caps aren't that great and the cases tend to yellow quite easily.
I made a typo earlier when messaging Special K back, meant to say that the adapters I sell have 1.12 which is the latest version.
I only use 1.03 for my LYNK keyboards as Hasu pointed out a while ago that the older firmware has a little more flexibility with the ability to detect XT parameters. The DC2014 is only supported by the new ones and does require that "Reset" pin as documented above.
Still not sure a Hagstrom converter will work with a DC2014, but I've never had one though. My reasoning is that Soarer's seems to be more advanced in every way, so I'd be surprised if the Hagstrom can do it. Soarer's didn't even support it until the later firmware versions. With a Soarer that you wire up yourself, you will be certain to have a working board at the end, and for less cost.
If you really don't want to wire yours up, I can do the wiring at a similar price and test with one of my DC2014's so that you'll know it is plug and play. Just haven't opened up my DC2014's since I got them and don't exactly remember if the original wires are soldered to the board or if it's a removable plug which would affect whether or not I could put the correct connector on it to be plug and play. Kind of defeats the purpose if you end up having to still solder it in yourself once you get it, but I could at least color code it for you and send you a picture of where the wires need to go.