To a limited degree, it is certainly possible. The first thing to do is set the workbench to 4 colours, and set it up with the original blue/white/black/orange colourscheme.
Next, install birdie and visualprefs. Set up birdie to give you white/blue striped titlebars, and set up visualprefs to remove the 3d borders of windows (set all the window border lines to white), set the screen title bar to blue text on white, with no black line.
Next, change all the gadgets to images from a WB1.3 screengrab.
With enough work, you'll get a pretty accurate WB1.3 lookalike, although you'll still have KS2.0+ style depth gadgets.
