Now available is here an online version the Älvdalsk Ordbok of Lars Steensland. It contains a Svenska-Älvdalska and an Älvdalska-Svenska search function. This is indeed helpful.
Here is yet another dictionary... of the dialect from Klarälvdalen, which is the next river valley south-west from Älvdalen on the map... there are some similarities to Älvdalska... http://dalby.ordbok.gratis/
Thank you for the information!