congratulation that you have this car.This is great.
First of all I dont know the reason to put mask model one to model 2
I sold original mask for model 2 last week...
Concerning to the mask for model 1 it is not possible to buy it as a old one on bourse. I know what I am tallking about because I have been several times on bourses is Czech and Slovak and there is no used mask on market. It is probably because three headlamps was prohibited and everybody changed this mask for new one and old one has been thrown to the garbage. Seldom is for sale only front glasses but they ask 6oo EUR. Ad now what I know now nothing is for sale...
I know what I am tallking about because I have tatra 603/1/59 car and I have the same problem also.
Only one possibility how to put new mask is to make from original parts copy. My fried make some parts for this mask as a lights etc. One in Czech make back pannel= plastic..one front pannel plastic also..
I can help you to collect this parts but it takes time and be sure that you will spend min.1500EUR may be more . So think about this and let me know.
Hear you soon..