Hi, I am new to this forum, but have really appreciated the wealth and experience available on this site on metal work. I am a Knife-making hobbyist with an equipment problem. I recently purchased some used, custom build right and left hand thread arbor extenders which are 5/8" in diameter. ( See photos) My Jet buffer arbor is 3/4" in diameter. I need a right and left hand reducer, 3/4" to 5/8" and can't seem to find them anywhere on the internet. I would appreciate any suggestions or recommended vendors. Thanks.