I'd be wary of these so called bootlegs that have been appearing of late as it's not to difficult to make your own bootleg nowadays. All you need is to make a good looking cover and a professional looking disc then you can knock them out for a tenner at a time. A lot of the older recordings can be found if sought out and probably for little or no cost if you ask the right people. Also the band don't make anything form these recordings even though it's quite difficult to control but you can argue it's a type of flattery for bands. From what I know all the classic NMA boots are all on vinyl, Clog Dancers and Join The Army are just a couple of examples.