Not having the tools to make components I decided to try and source parts to make my own. So this is what I have come up with:
1/4" Aluminum Screw Posts
MR695-ZZ Radial Bearing 5 x 13 x 4mm
PTFE Flat Washer, USA Made, #8 Screw Size, 7/16" OD, 0.19...
Figure I will need to reduce the thickness of the heads on the post and screw but that should be easy to sand down. Bracket will be a thin piece of aluminum I have laying around. Plan to make the hole in the bracket wide enough to get the screw through but not the post. This way the screw and post will tighten down on it to keep the assembly from moving. May make it so I can adjust up and down to control the tension.
So asking for feedback or comments on the design or possibly alternative parts.
Handy chart for inch to mm conversion.