I have one of the older leather tour packs that is lockable on my Heritage but the lock fell out. Does anyone know where I can order a replacement lock?

 

I don't think the "older" leather tour paks were lockable stock.
There may have been a kit or something available but I too have the older model leather tour pak and mine has no lock.

 

Mine had a lock on the side of the tourpack but it unscrewed and fell out. Now I just have a hole there.

 

That must have been an aftermarket add-on.
If you find a replacement post it here, I wouldn't mind adding a lock myself.