Budget ESB brorunner

[SByota]

Where do you buy your HDPE? McMaster is pretty expensive so I look on eBay, amazon, etc. but never found a super good source.

My mistake, I used UHMW from McMaster.
Slippery UHMW Polyethylene Bar, White, 3" Wide, 3/8" Thick

https://www.mcmaster.com/8702K77
And bushings.

https://barnes4wd.com/products/poly-bushing?_pos=1&_sid=aecbf75d6&_ss=r
I use these poly bushings for the top and regular Deaver poly bushings for the leafs. My shackles and inner pivots are all 4130 to help reduce the wear.