You can make your own fingerboard, with this mold and wood.
similar - resembling or similar; having the same or some of the same characteristics; often used in combination; suits of like design; a limited circle of like minds; members of the cat family have like dispositions; as like as two peas in a pod; doglike devotion; a dreamlike quality. like.
Equivalent of would be used with the word as a noun: Eating pasta with a spoon is the equivalent of driving with a scooter.. Equivalent to would be used when making comparisons with the word as an adjective: Painting with your feet is eqivalent to sitting on your nose. They can both be used interchangably, the only real difference is we would say the equivalent of and equivalent to.