The company which supplies developer for Gigabitfilm now makes a new Speed Photography Ultra Resolution -- SPUR developer(posted 8201 days ago)Agfa Copex Rapid, a document copy film developed in SPUR results in 600 lpmm resolution, double that of Kodak Technical Pan in Technidol.
This is an interesing altenative to gigabitfilm. SPUR AND AGFA COPEX
Some Minox photographers use SPUR with Ilford Delta 100 and Kodak Tmax with good results.