Where are you located? I have three used Flexmod P3s that have bias control (as opposed to the problematic stand-by beam suppression versions which I threw away many years ago). I am based in the US. I'm happy to sell them cheap. Please just PM me.

Alternatively, if you reach out to BBE/X-Wossee/Vladimir directly at wossee <at> gmail.com he can hook you up with new SimpleDrives in the appropriate power for whatever diodes you intend to drive with them. He sells 500mA, 2.5A, 5A and 6A versions if I recall correctly. SimpleDrives are my favorite driver. Feature-rich, inexpensive and reliable. I have purchased hundreds of his drivers.
-David
"Help, help, I'm being repressed!"