I may very well be that you would realize an improvement in your prints by switching to a pyro based developer. I would encourage you to read the article that Sandy King wrote on the subject. This article is located at www.unblinkingeye.com
The reports that I hear on Efke film is that it works wonderfully with Pyrocat. George Provost is doing some really nice work with that combination. I imagine that there are others as well.
I mix this developer from the individual ingredients. However Artcraft and Formulary both sell kits of the proper proportions of the individual ingredients. It is a very economical developer. It proportionally stains the negative without providing a great deal of general stain. Additionally the stain is not counterproductive to VC filtration if you happen to be enlarging your film.