Discshop.se are selling those DVDs if somebody wish to buy (however I don't know if they deliver outside Europe you must ask for it from their customer service)
Maybe some kind German speaker can watch it in German and write down all the text what he/she hears?
Yes, I know that it is huge amount of work....
Swedish dvds does not have Swedish subtitles despite opposite has been written in product descriptions in various shops
Here are dvd covers (backsides)
https://www.discshop.se/img/back_large/ ... bullerbyn_ vol_1_2_disc.jpg