I know, the badges are a costly business! I'll be honest though, with my ST ones I cheated and got the cheapest ones I could find on ebay. They're a trial fit really and could be comin off if I don't like them so not too worried about the quality...cos if I do like the look and the badges turn to crap then I can just repalce with real ones afterwards knowing they won't be a waste of money.
Think my ST tailgate badge was under £2, and the frint grille badge was about £5-6.
As for Titanium/Zetec S spec, I don't think the Titanium ever came with the kit fitted, but I'd say there were Zetec S's built with the Titanium spec, as most of the spec were probably optional extras if ye know what I mean.
They did this on 05 plate Mondeo Tit X's as well...fitted them with the final facelift (chrome trimmed) ST bodykit, which I think only came on ST's from 55 plate. Lot of them seemed to be rolling on 17s though rather than the Mondeo ST multispoke 18s.