sdrunge123@gmail.com

Occasionally they come up for sale but they are usually expensive to ship.  Maybe a local welder or machinist can take off one end cut down the length and weld the end back on.  Then you would need to make or buy new leaders.  Should be pretty cost effective. 
Nigel

Just a suggestion:  Take all 3 rollers to the welder/fabricator at the same time.  Have him cut off the end without the gear, and then re-weld the shaft caps after the rollers have been shortened.  Tell him you want them to all be shortened exactly the same amount.  After the rollers have been shortened then take to shortening the actual table top.  With the rollers in hand it will be easier to get the top cut to the right length.  No chance of measuring errors, or communications mistakes.  Good luck.  Jim