Please read the forum rules with regards to wanted and for sale adverts. These must go in the classifieds section so feel free to post a wanted advert for the glass you need:
As Ucof says, it's unlikely that anyone would send you a door glass from abroad because of the risk of it being smashed in transit. Your best bet is to try local scrapyards near to you and find one in there. Other than that you may have to try contacting a Fiat dealer though this is likely to be expensive. Additionally to Ebay.pl, try Ebay.de as the Uno was a popular car in Germany/ Deutschland. Also remember that you can fit door glass from both a mk1 and mk2 - they're the same and will inter-change. Lastly, bear in mind that the turbo Uno came with factory tinted glass (slight green tint). Base model Unos came with clear glass only so make sure the glass you're buying matches the glass already fitted to your relative's car.