Hi Shocky,
Hmm, that's odd, I can see ROM Manager perfectly well in the market. What android version are you running - I don't know the Blade, but I can see that RM requires 2.2 or up, so perhaps the market doesn't think it's compatible with your device? You could look for it via play.google.com.
I've moved the post to the All Things Root subforum, where you might get a better response.