It is a great period indeed! A previous drought on figures has been banished by several new and excellent ranges. In no particular order the following manufacturers deserve a look (including some ranges which are technically out of period but which with some or even no converting are eminently usable:
FOUNDRY Grand Alliance/Marlburian & GNW ranges
FOUNDRY 7YW range - Russians particularly useful especially those in Corps of Observation waist coats and the New Coated Russian who can actually substitute for Swedes!
REIVER CASTINGS: Extremely extensive range with many wonderful figures
MUSKETEER MINIATURES: Expertly sculpted by one of the UK's top figure designers
FRONT RANK of course you know of them!
STRATAGEM/TRENT MINIATURES: Limited and patchy range but some nice figs in there
DIXONS: Good range
I think that should be enough for now.
The rules will be available directly through this site and possibly through some traders at shows throughout the UK.
I will send you the 'free version IV' check your Inbox after reading this mail.
For info on the period I strongly recommend you make a cup of tea and take a trawl through this forum, there is a huge amount of referecne material here from some very knowledgable people including Bibliographies, battle accounts, orbats, unifrom info and site links.
Hope this helps