How do I find these transformers? Please help me identify
Get a ferrite pot core and wind the transformer yourself. There is zero chance of reliably finding these transformers from the tens of thousand custom transformers available and, there is only moderate likelihood that one of those tens of thousand might be the one shown in your picture.
The # numbers are likely to be SWG gauges (rather than AWG wire gauges): -

#45 = SWG 45 = 0.0711 mm diameter
#25 = SWG 25 = 0.508 mm diameter

Table: -