Earlier in the thread drt7uk asked about possible livery options. I don't know of a website with all the liveries but the book The Vale of Rheidol Railway in Detail, published by the railway, documents the liveries that have been carried:
GWR era:
Unlined GWR green - GREAT WESTERN on tanks (locos 7, 8, 1213)
Unlined GWR green - shirtbutton on tanks (probably 1213 only)
Unlined GWR green - GWR on tanks (7 only)
Unlettered plain green (7,8 only)
BR era:
Unlettered plain black (1213 only)
Plain black with BR early emblem on tanks (1213 only)
Plain green with BR early emblem on tanks (7, 8 only)
BR lined passenger green - late emblem, nameplates added (7, 8, 9*)
*formerly 1213
BR simplified lined passenger green - late emblem (7, 8, 9)
Unlined BR blue (7, 8, 9)
Lined BR blue (7, 8 , 9)
BR era 'historic' liveries:
Plain GWR green, shirtbutton on cab side (8)
Yellow ochre (9)
Cambrian black, CAMBRIAN on tanks (8)
Lined BR green, late emblem on cab side (7)
Under Brecon Mountain Railway ownership:
Plain green (7)
Lined green (fairly similar to the Talyllyn railway 'standard' livery (7)
BMR lined red (9)
Under current ownership all three locos have reverted to GWR green with GREAT WESTERN on the tanks. 9 has also appeared in plain black with early emblem in recent years (as in PaulRhB's photo on page 6 of this thread) but this isn't documented in the book. Under BR ownership the locos were assigned TOPS numbers - class 98 loco numbers 98007 to 98009 - but these numbers were not carried in service.
There have been numerous alterations to the locos over the years, from the removal of the steam heating pipes on the front buffer beams (present on the EP) in 1938, to the additions of name plates and smokebox number plates in the BR era, conversion for some years to oil firing, air brakes replacing vacuum brakes, heightened cabs, reduced cabs, etc., so the producers of these models will have their work cut out to ensure all is accurate. But the EPs look very promising indeed – will these be the most detailed and accurate 009 RTR loco to date? I particularly like the cutaways inside the frames to allow the pony trucks more swing (I modified my Heljan Manning Wardle by thinning the inside of the frames in similar style, using a Dremel with a sanding attachment, and can report that it isn't a procedure for the faint hearted).
It will be interesting to see if other manufacturers follow the Model Rail / Revolution lead by producing some VofR rolling stock - Peco or Fourdees perhaps. Here's hoping.