Hello and welcome to JustAnswer!
Is the radio just not working or is it actually asking for a code? If it isn't asking for a code then the radio itself has most likely failed. If it won't work at all then testing the powers and grounds would be the next step. If they are ok and the radio won't power on then it will need to be replaced.
If it is actually asking for a code and there is no code available from Ford for this radio's serial and the vehicle's VIN then there are only a couple options. You can replace the radio, or you could try sending this one out to a repair facility. There are electronics repair facilities that specialize in automotive radios and they will have the ability to remove the code feature from the radio or may be able to use their equipment to retrieve the code from it if there is one. If the radio has simply failed then a repair facility will likely to be able to repair it also, which is usually cheaper than replacement.
Initially it was a fuse that was blown but once that was replaced it then requested a code but as indicated no luck from Ford will try radio repair have also found a replacement on ebay if repair person fails. Many thanks