booklet printing

I have been investigating printing my booklet to showcase my final posters on newspaper. I was hoping to find a printing press that would be able to print it on 42.5g paper. However, after many phone calls and some research it seems that this is not possible as specialise printers are needed and the amount that i want to print wouldn't make it cost effective to print.

Also, to print double sided on A2 is unmanageable and not readily available therefore I am going to get my final booklet printed on A3 80g paper which is the lightest available, double sided. I propose to get 50 printed which will then be folded into a booklet and distributed at the exhibition.