Fabs,
I like Alemite products. They are available from about any auto parts store. You probably won't be operating over 125 PSI, and will most likely use 3/8 hose and 1/4 inch male threads I would imagine that is the most popular. I would imagine that about any good auto supply store would have them in stock. If you can't find one locally, let me know.
I thought I had a couple I had bought when the local Tractor Supply Co was going out of business, but what I have are two new lubricators, still in the box. New, never used, just dusty. The price tag says $6.99 plus tax (be about $7.42 total). If you still want a lubricator I would send you one of these and a dryer from a local supplier for whatever it would cost me. I suppose freight would be another $6.00 or so, I'd have to check my UPS shipper program at work.
This should take you to the info you are looking for:
http://www.alemite.com/catalog/detai...ndard_packages
It also has lubricator info.