Etrex Touch 25, my rubber power button has come away and fallen into my unit!!!! HELP

I have an Etrex touch 25 and the only external button is the power button. I removed the bump case i keep on it all the time and noticed that the Rubber power button had come away all the way around and at that moment fell into the unit! I only use my unit for Geocaching and have always been very careful with it, to find it broken is very upsetting!

Has any one else ad this or repaired it at all? or had Garmin repair it for them?