Mainline did a Stanier composite, and a a BSK of which I had three and as a RTR offering in BR maroon with crest. I thought they were very nice. I didn't mod them at all as it was a look I was after as opposed to a true prototype. They ran very well and responded nicely to Bachmann wheels and couplings. Long since moved on as I went to Bachmann MK1's. Replica also did a RTR Stanier open third in maroon from the same tooling stable I'm led to believe and they occasionally come up on the eBays although quite pricey.
Regards
Guy