All van drivers (except the ones who drive fully electric vans) have to purchase vignettes themselves and pay driving charges if they drive on toll roads.
You can find all toll roads in Lithuania here: https://lakd.lrv.lt/lt/keliu-mokesciai-ir-rinkliavos/naudotojo-mokestis/apmokestinti-keliai.
You can purchase the vignette here: https://pirkti.keliumokestis.lt/purchase/cart.xhtml.
In Latvia vignettes are included in the price and drivers don't have to buy it.
In Estonia You have to buy vignette if the vehicle weights more than 3500kg.
You can purchase the vignette here: https://www.teetasu.ee/