Just ordered some figures from Forged in Battle and can confirm they are up and running and sending out their new Dark Ages figures.
I asked about any plans to provide smaller packs specifically for DBA and got the following reply:
No we will never sell them in smaller packs as it is not commercially viable. We offer the best variety and quality at a very good price. We are so grateful that folks love our figures and choose them over others regardless. We are also happy to do ‘special orders‘ though If you are buying into the range and want a few more of one type in a certain compilation, as long as it is not too ridiculous and time consuming, as our moulds are set up to produce complete pack sets. Email at the time of ordering and we will always see what we can do.
So looks like there may be some flexibility if you ask before ordering.