I'm not sure if this is the right forum or not so point me in the right direction if it's not suitable here.
We're currently trying to source the origins of a hard copy of a map we have. It is dated some time in the mid 20th century. I had a look at GeoHives and it doesn't have it (the 6inch and 25inch historic maps are dated earlier than our one, as is the Cassini one). Our map is a street level view of our area which is what we are looking for. It outlines properties and their boundaries from this era.
Would anyone have any tips on how we might go about finding the origins or our map? Are there any other online resources we might check? We're happy to pay for any service that might get us what we need.