Hi Chuck, good to see you're still trying to sort this out and looking at all your options in case they wont hear your appeal! Is your case still in Juarez? Did you visit the
immigrate to us forums? Those folks really seem to know Juarez inside and out and they would be the ones i'd talk to about your options.
Most countries now have a 6 month 'legal' residency requirement to file for DCF. If it's an option for you, that may be your best bet if the K1 appeal is denied. If not, you will need to legally marry and file for a spousal visa.
Hopefully someone will be able to convince them that a license to marry does not mean you are married and they will approve your K1.