You should have a certain amount of play utilizing the tensioner. Plus you always have the option many shops go with in making your own blades. Just purchase a spool of blade, then braze/weld the length you need (Also handy if you need to make an inside cut on a piece). You can also check thru the different possible manufacturers listed on OWWM and possibly could find your model + info.
OWWM Like most, they were made by multiple manufacturers and rebranded. So might take some searching. -MJ