I recently purchased a tach dash for my car I took it apart to clean it up as it was very dirty . also someone dropped it on one corner and cracked the left front corner , ive since repaired this. Behind the gauges theres small black rubber pieces prob to fill in the gaps or cushion the gauges? They are dry rotted of course I was thinking I could use vacunm hose cut to same size to replicate this. any ideas? mark