IMHO The F-84 in Randers is not worth the bother. It has been used (as you say) for fire and rescue training.
Unless you are looking for just an airframe display (maybe a gateguard), its really too much work, considering that the F-84 is not rare.
I’m have recently become a member of a Danish aviation museum, and will hopefully begin working with them soon. They are well connected with the Danish air force and the Danish arms collection museum. I will ask around to see whats stored around the country.
They might want to know a few things before even looking at allocating a stored aircraft. Would you mind answering these questions, and maybe fill in any other information you find important to mention. You can do so in a PM if you like.
What would be your future plans for such an F-84?
What museum are you affiliated with?
While you are having a look can you find out if there are any single seat meteors going spare please?:)