Gary, I think I have one that works but the glass is loose in it... Rattled in flight and drove me crazy, my buddies in the know say a dab of silicone will fix it... When I took the old 328 radio out I put it in a box somewhere in the barn because my king radio came with an indicator with glide slope.. PM me your address if interested... If you can use it great, if you can't send it to someone who can. Dave