What about catching wild crickets, then breeding them for many generations? Using the babies say after 3 generations while making sure to move and clean after each gen.
Since you are in europe, I would try and get a hold of a good pair of E. Angramainyu. There are so many people doing high end morphs that I think people are missing out on the beauty of the natural normals.....
The first one I ever had loved anything that moved. meales and superworms went down with ease but he would pick a cricket first if they were both in front of him. the next four were partial to crickets but if they were not fed for a day then they would eat mealies and supers. This new one I...