First all I must tell that the voltages in the transformer and around it are lethal and must be done attention in all operations.
Yes, if It's possible to find a tranformer (toroidal I suppose) with:
- same power (or higher)
- same number of secondaries and same voltages output rated at 230 Vac input (to primary)
- compatible dimensions to the original.
The problem is having these informations.
I council you to contact Exsposure for the 230Vac replacement transformer, I suppose that It's possible to do it.
The direct inspection by tester is problematic because the italian Vac voltage is 230 not 110-120 Vac and connecting the amp to 230 Vac it's very dangerous (be carefull).
A solution can be is finding the schematics or connecting the amp to an AC adaptator from 230Vac to 110 Vac (be carefull to max power rated) and testing the secondaries , before all it's necessary to disconnect the secondaries from rectifier(s).
It's possible to use an sin generator (function generator) for tested but this a secondary way.