Have to disagree, many 80's tunes are very rare. Inparticular 45's, by the 80's so much was put out on 12" as the main press and the 45's as a small second run. Also all the same principals still applied as in decades before. Artists making records, putting them out on small local labels, having no sucess and many of the copies being thrown away. Also by the 80's you could get a 45 pressed by a plant on much smaller run than in the 70's and 60's, so in some cases runs as small as 500 would be done and with no success, most being trashed.
As to weather you concider it Northern, thats a whole other story, which like a revolving door comes up on this site month after month. What is the definition of northern soul, different with nearly everyone you speak to.
Could list many early 80's 45's which are all most impossible to find, but it's late so maybe someone else will taker up that challenge.