Get a proper vac bagger. VacMaster 215. Commercial bags are way cheaper. 1000 for $65. Tons of sizes and thicknesses. I went through a few food savers. Finally went to the VacMaster and never had a issue of losing seals anymore. The price is considerably higher up front. But once you go through a food saver or three and the price of the bags. It isn't much different.
Where do you typically get commercial vacuum sealer bags in quantity?