try avionics source they are actually coming down in price since Garmin will not support them in the near future there an avionics shop in Minisota that sells them very reasonable If I find thier name I'll pass it along
I have a 182Q with a right wing leaking, I tried Weep no More but after 10 phone calls and no reply from Paul Beck I was recomennded Tom's Aircraft in Long beach, does anyone have any comment or deal with Tom's AIrcraft?