A bit off-topic but if you are interested in going down the ex-racehorse route may I suggest an excellent friendly forum :
www.horse-directory.co.uk Their main focus is ex-racers but it is open to all and they have sections on different activities like western.
Quite a few people who post on there ride western and there have been previous posts about people converting ex-racers to western with great success.
Also there are lots of people with "contacts" who could help you get a foot in the door with lots of rehabilitation places for TBs.
Good Luck, it sounds like a great idea and the more articles the better ;D
In regards to the "anti-western" editor;I think that was a man and now Lucy Higgins is back from maternity leave, I don't know her stance on western though...