Playing a module I own

Due to quarantine, I have been forced to play with friends online. We've been using poor-quality images as the map, etc. Our GM owns Curse of Strahd, and I was wondering if there was someway to get it for free. It's not the end of the world if not.

Unfortunately, though the content is complete, Curse of Strahd the print book is a different product entirely from CoS the Roll20 module, in terms of structure and development. There is no way to apply the purchase of one toward acquisition of the other. The comparison most often cited is that purchasing a book doesn't give you a discount on buying a ticket to the movie version.

There is the Castle Ravenloft Map Pack. I am not 100% sure if it covers your needs (because I am currently a player in the Strahd campaign) but it could be worth looking at it. Some of the artists making the maps also sell them separately. I think Mike Schley made the Strahd-maps