I have had my ETX-125 for over 10 years, and the red dot died. Meade no longer makes them and I am having trouble finding options? The Red dot attachment to the scope if very thin and I have bought 2 other red dots that just won't tighten hard enough as its very small. I saw other mounts but it appears I have to drill into the scope?? I am not going to do that, so can anyone help me here? What options do I have?