You didn't say where in Hungary but this is for Budapest and there may be others.
I found Modell Makett at 51 Erzsebet Korut which is right off Andrassy Ut if you are looking away from the Danube. It was bit of a disappointment as it was quite small but it may depend on your interests. He didn't speak a word of english either. If you are interested there is a highly recommended Railway Park which I didn't get to visit so it's my excuse to go back. http://www.mavnosztalgia.hu
I found Modell Makett at 51 Erzsebet Korut which is right off Andrassy Ut if you are looking away from the Danube. It was bit of a disappointment as it was quite small but it may depend on your interests. He didn't speak a word of english either. If you are interested there is a highly recommended Railway Park which I didn't get to visit so it's my excuse to go back. http://www.mavnosztalgia.hu