The VUDU “WEBRips” are still floating around.
EDIT: The following episodes on VUDU are not in their FS 4:3 broadcast format:
S1E14 TKO (LB 4:3)
S3E10 Severed Dreams (LB 4:3)
S5E03 The Paragon of Animals (WS 16:9)
S5E22 Sleeping in Light (LB 4:3)
These episodes retain 2.0 audio tracks and so are not without value.