Hi,_

I attach a picture of a high frequency transformer similar to mine (no the same, it's just a representation)

Is there any way to replace an old high frequency transformer which is open? It has the following outputs:
12V
12V
24V
12V and -12V with central tap.

There is no chance to find the exact model of transformer as it is obsolete. So what would you recommend? is there a way to design an alternative to this in that size? I mean, for example, if you know an integrated circuit or something that might help supply this voltages instead of a transformer? Or do you know a place where they can build a new transformer like that?

 

How about a picture of the actual unit in question. Any identifying marks on it that might lead to some specifications?

 

You could dismantle it and count the turns and measure the wire diameters as you go and then rebuild it.
If you're lucky the open winding will be on the outside.