In answer to your question about a Redwork font, there is not currently a Redwork font built into PE-DESIGN. I will pass on your request to the engineers who write the software. Who knows, we may get one in the future. We can always hope.
You can have lettering without a fill with a Redwork outline, but I don't think that is the style of lettering you want. However, just in case here you go.
Any of the built in or TTfonts can have the fill stitch turned off and the outline turned on with a triple stitch as the outline style. In the Sewing Attributes window, you would change the Run Pitch (stitch length) to 3.0mm. You would have a Redwork style outline.