Does anyone know a link to a master list of Nak cassette belt specs? I have 3 decks which need belts a ZX9,CR7 and CR4. I've been in VCR repair for years and know that flat belts go for a buck or two a piece-I hate to pay 30 bucks for a single cassette kit that isn't original. The dimensions I need are circumfrence, width and thickness. Thanks in advance.