Miter slot runners for sleds - suggestions?

Miter Slot Runner - Customizable by abitrandom - miter slot runners Features: 34-wide x 38-thick x 30-long bar fits most miter gauge slots; Extruded aluminum profile is machined for 1 miter slot miter gauges or whatever tool rides in your miter slots See the Miter Gauge Bar Upgrade

miter slot runners I believe the miter bar is meant to be 516 x 2332 in size, but the standard miter slot on most table saws is designed for a 38 x 34 miter bar