WEN 100 in. Track Saw Track Guide Rail and Adapters CT9502 - The Home Depot
Makita Guide Rail Solutions
Bosch Professional FSN WAN angle guide for guide rail (compatible with all Bosch GKS Professional circular saws, GKS G-models, GKT plunge saws, selected GST jigsaws + GOF routers with adapter)
Making: Circular Saw Acrylic Adapter for The Track (Rail Guides) - YouTube