Randomly I was looking at an old edition of Hornby Magazine, I can't remember which one either 2009 or 2010, and almost all the top 10 were now available R-T-R. It may take a while but it does seem that the big four do pay a fair bit of attention to it. I will have to try and find it again.
Another vote for a decent LNER shunter of some description, other than the J94 you're already doing and the Y1, and some more DMU's. Updated 155/156 maybe?