Thanks for you replies!
I don't plan to go for gut - more expensive and less durable. Besides that, coming from the guitar world, I'm new to the instrument (or, well, the instrument is new to me..), so I have to get used to the courses in the first place - no need to slaughter some cute animals and tear their guts for that. There is a good probability I won't ever leave this opinion, so the no-gut way is the most economical and the most ethical one, for me.
Is there such a possibility to replace fretgut too?
Regarding strings only, I've also found LaBella VLG#1 and VLG#1a sets. They also offer singles and 7-course lute sets, which maybe could serve too.
2014 Martin Okenica cedar, modern (H. Hauser I inspired)
2012 Martin Okenica spruce, early romantic (F. R. Lacôte inspired)