I have replied to this issue before, but its not a problem to repeat myself.
You are correct the full range of HARMAN Direct Positive is available in FB only.
The last coating of RC failed. This was due to a coating issue that has not yet been resolved. We are looking at various options for an RC product going forward and when I have any information or timescales I will let APUG know.
Simon ILFORD Photo / HARMAN technology Limited :