Found a pile of rims and two suspension frames the other day and scored this gem in the pile of steel rims from a roadmaster explosion...
A nice disc front wheel in great shape under some dirt.
I also just happen to have a manual disc caliper from a scooter that fits the disc perfectly.
It even has a steel mounting plate already sized right to simply weld it on the fork leg super easy. Sometimes things just fall together!
I'll post some pics when I get around to the conversion
If more is better, then too much is just enough.
If you can't afford it, build it yourself.