Hi Jarek ....welcome to the Club
Have to say that i needed to look this model up as never seen one before
Very impressive machine and see that many have been modified to look even better
Post up some pics of yours if you want to
Sorry, not sure on where to get components for the audio to convert to UK but years ago there just used to be an adapter that connected to the aerial and that converted it to UK stations.
Not sure if there are any around nowadays as it was some time ago when I last saw or fitted on