You won't need specialized nozzles, you understand the material wrong:
The benefit the properties of this material grant is not super fine prints (which you can get with small nozzles like 0.1 mm already), it is that you can print at super low temperatures. Printing it at standard 200°C will mean, that it won't solidify in the time the printer needs it to, and your walls will all melt down - in worst case it boils off and degrades into useless goop!
You might print PCL onto an already completed print made from a different material with higher printing temperature (if your slicer lets you do that...), like to make a form-shaped piece.
It's low melting point also means you could print parts with it that you want to deform under low heat, like a standard shaped flat shin and then just dunk it into 60°C water or put onto a (towel shielded) pocket heater before molding it around the patient, making perfect fits from easy transportable (flat) parts. Or you print "rivets", which you heat, put through the holes in other prints and then flatten with a pair of pliers.
Also, it is one of the cheaper conductive filaments. You might find this article or the RepRap Wiki enlightening.
Beware though: Many printers have a MinTemp set! For example the Ultimaker at 175°C, and you have to force the machine to ignore this with M302.