Aircraft Spruce sells prop spacers in thicknesses from 1/16" to 3/8" pre drilled. They are on page 171 of the 2003-2004 catalog. $21.40 for the 3/8". You could stack then but you probably would fare better having a machine shop make you one like Langford suggested.
Mark Jones (N886MJ....4.1 flight hours) Wales, WI melloflyer wrote: > Does anyone out there have a prop extension, either 1 inch or 1 3/4 inch > for > sale or know of a source?