I have the same phone/same problem. Found someone w/ a newer label maker and had them run a label w/all of the numerals then using scissors and a pair of tweezers, cut out only the numeral and placed the label on the buttons. Haven't had any problems for a year+ so far. Cheap too :)
Steve
February 2008
Hi Donna, while this company actually makes decal overlays for keyboards, I figured you might want to consider them.They do custom overlays as well, but personally I think these would work for a phone. You might want/need to trim them to fit better?
Good luck!
http://www.datacal.com/products/d-standard-replacement-overlays.htm