Stupid Harmonic Balancer

[1972C10]

I went to check the timing on an engine i recently had built Maybe has 2000 miles on it and i coudlnt find the mark looked and looked no where to be seen

So i was going to check and see if anything was obstructing the line since it was covered in muck from the roads and i only wiped it with a rag i found the mark it was clean


Looks to me like it slipped Does anyone know of a good place to get a NEW balancer im tired of putting repair sleeves on old ones and have problems ..

I dont want a fancy aftermarket one that does a bunch of neat stuff since this is a worktruck Cheap as possible Stock replacement Any info would be greatly apreciated ,

So far ive only seen these and im thinking there is someone who has cheaper. Proform Balancer