Here in Germany there are a few people legally breeding Naultinus species. However, they normally do not go to expositions and do no tell too many people about this part of their collection. Otherwise they end up with overflowing mailboxes and a bothering frequency of phone ringings.
Also they are afraid of people steeling their lizards, which are mostly kept in "normally secured" outdoor enclosures during summer.
In a nutshell: Yes, there are breeders, Yes, they do swap and also sell offspring in small numbers and for prices in the 1000$ range.
Afaik that is true for the US as well as for Germany.
But you have to find out a breeders address on your own. Having close contacts to a renowned gecko expert may help....
Best regards
Ingo