^^^gave me an idea. Idk if this is what he's tryna say but I'll say it anyway.
You take an ics bolt, but make it a lot shorter, so it raises an inch or two above the fork when you put it in from the bottom. Then you put the spring on so it raises two or three inches above the fork (higher than the bolt). You then screw on one nut, then the top cap to your threadless headset, then another nut to keep it in place. The top cap thing will work kinda the same as HIC, meaning it'll press down on the spring (would be shim for HIC) thus compressing the headset, and holding the fork on.
No pins through the fork. So no weak spots.
Only problem with this is that you'd probably need to put a shim over the whole thing, meaning you'd need more oversized bars than oversized bars. Like 1 1/2'.