I use SignBlazer Pro and Corel X4. Why not import into Corel, and then export as level one postscript file, then import to blazer.
I'm currently facing what may be a similar problem to yours? My main program that I've always used is Signblazer which I think is a great program and often better at doing the job than corel, although the display is far better in corel. I have a graphtec and can cut direct from corel using cutting master, but to be honest, it's a pain in the ar*e, so I tend to use both programs and switch between, mainly cutting out of blazer. I'm currently considering switching to a new dedicated package as I'm worried about future proofing work if I carry on using Signblazer for much longer. I'm considering vinyl master pro, as demo seems to work well, couldn't really get on with signlab much.