Kevin,
You mentioned large hydrostatic lubricators. I remember some of the guys working on EX SP2248 in Texas commented they missed the mechanical lubricator when it left with SP1744.
I am going to try and upload a photo of a small lubricator on one of the Louisiana plantation locos that never made it to Six Flags. I am sure it is a standard make, but I don’t have any photos that show a builder’s plate, etc. The injectors had Monitor plates on them. They are probably not much larger than your hand, but they appeared to be just like the “big” ones.
Some of the Louisiana sugarcane equipment trade magazines have ads for this type of lubricator. I have one here somewhere…
Here is a roster photo of the locomotive.
[lrs.railstuff.net]