People may be interested that the UK international railtour operator, PTG, are advertising an ex-NMBS type 12 as working one of their tours on 18th May 2019.
From http://www.ptg.co.uk/rail-tour-holiday-hungary (my emphasis)
Riding on their tours can be (very) expensive but it is possible to book the train separately from the hotels and to book individual days on the train.Day 5 Saturday 18 May (B) This morning we make a circuit of lake Fertő-tó (Neusiedlersee in German) diesel-hauled, behind a different type M44 locomotive from the one used on Thursday. A one-time permission will be sought for our loco to travel between Wulkaprodersdorf and Neusiedl am See. From here we hope to use the other GySEV 233 via Hegyeshalom towards Bratislava, but if it is not available a V63 will be used instead. At the border, Bratislava museum loco T678 0012 will take over for the short journey to the Slovakian capital. Nicknamed Pomeranč (translates as orange), the locomotive will haul us into one of the many freight stations in Bratislava, where we hope to enter an extensive freight complex. Please note that our route will not necessarily bring us into the main station. A former Belgian Railways (SNCB) Class 12 locomotive, now operated by CER Slovakia will speed us back towards Budapest via Nové Zámky, although paperwork may require, or finances may allow us to use a different locomotive between Štúrovo and Budapest-Keleti station.