Depends. Why are you exporting to Flexi? I create print files in Corel all of the time. If it's just a print then export a150 dpi RGB jpg and bring it straight into Production Manager. If it's a print and contour cut the create the cut lines as objects WITH NO OUTLINES, convert everything to be printed to a 150 dpi bitmap, then either export everything to a PDF with RGB specified for bitmaps or export everything to a legacy CMX file. Bring the file into Flexi and convert all of the contour line objects to contour cut
An RGB bitmap will come as close to what you see is what you get as you're likely to achieve..Assuming your bitmap rendering intents are set to 'Perceptual'.