Although I'd like to buy four Hoover FV-35E vests, I don't do enough flying over water to justify the $300. I do fly along the CA coastline and would like to take an occasional trip to Catalina Is. I noticed that MajorSurplus offers Navy surplus (circa 1987, never issued) vests for sale. Do these accept commercially availabe CO2 cartridges like those offered at West Marine? Is this a bad idea anyway? Thanks.