I just had an idea for your brake bosses. What if you ran springs from them up to a bracket mounted from the bottom of the steer tube? Big ol, fat springs that would give it a long extended springer look.
Here's what I did with my One-Liner build a couple of RRB BO's ago. This Butt Marker piece is available at your hardware / Home Depot store. As well as the 1/2" x 1/8" steel tubing and the springs. All relatively cheap.
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A rubber stopper plug wedged up in the steer tube of the fork works great for mounting the 'fork crown' piece (in my case the Butt Marker). Just run a screw right into the dense rubber.
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Your bottom attachment for the fork braces would be your brake boss stumps. My springs ended up rubbing the tire I wanted to use on this build, so I ultimately mounted them down low for the final position.
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