I have also found Dayco belts good.

Worked out my old Withco Victa engined edger takes the same belt as a 1989 Hyundai Excel a/c belt

Also found (but haven't needed yet) that Victa Tilt a cut edgers take the same belt as the early 90s Land Rover Discovery (either the A/C or PS belt). From memory only thing different was a 36 degree belt 'pitch' (if that's the right word) compared to the genuine TAC 40 degree. Although I believe the PT engined TaC's use a longer belt.

Regards
Tyler