The pully is a standard device, check
www.crossworld.com
the brake studs are another story, They are ACME threaded and scarce. I was fortunate enough to have I-ROBOT hook me up with a few spares from the last of the last in the bottom of his tool box. (many thanks Scott)
From info pulled from this site, they (acme threaded posts) were made by paragon for FC.
perhaps something you can have a machine shop make for you...
both of your issues stopped me on a build for 2 months, so I feel your frustration.