After visiting about 4 hardware stores in search of what I thought was a relatively common dimension I finally found them at a local hobbyshop I didn’t even know existed: ReservdelsRC. Went there yesterday and when entering the shop and looking around I saw their “Great Wall Of Screws And RC Accessories”, wow! Jackpot! I could even choose between two different materials and designs. Also, my calculations on screwlength will work. I got 20pcs M3x6mm and also just in case 20pcs of M3x8mm. Later I might also buy som extra M3x20mm’s for the Bat Bone.