Mehano are very much still in business. --> http://www.mehano.si/en
I have 3 of their HO diesel locos, 2 Vossloh G2000s, both the symmetrical and the asymmetrical versions and a JT42CWR (CLass 66 in English). All of them are superb models, highly detailed and excellent runners.
I haven't collected them but ran them on my last German layout and they will appear on my next one too.
steve