These are the 1st 1/48th scale resin conversion sets for the Tamiya 48th Scale Cromwell plastic kit coming from ACCURATE ARMOUR:

C48001 - Cromwell Vauxhall hatch
C48002 - Cromwell 75mm Wading Set
C48003 - Cromwell 95mm Wading Set
C48004 - Cromwell D & F Deck Set
C48005 - Cromwell Welded/Up-armour set
C48006 - Cromwell Late fittings/cupola set

Those 6 sets are all part of AA's so-called C-Series range of 1/48th scale conversion sets. The 6 sets listed above are already ON SALE via their website.

Future releases (about 2 weeks+ from now) are:

C48007 - Cromwell ARV
C48008 - Centaur Dozer Tank
C48009 - 95mm Howitzer Conversion
DE48001 - General decal set for Cromwell Gun Tanks

All for the Tamiya 1/48th scale Cromwell Mk.IV kit.

Furthermore, there will be to new full kits in 1/48th scale:

K48005 - Standard 12hp Light Utility (Tilly)
K48006 - David Brown Tractor (WW2 type)