WTB - Original pre-b mags for a compact 75

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I'm looking for standard capacity magazines to fit a compact 75. I'm in MA, so they'll unfortunately need to have been made pre-'94. A reliable source tells me that original pre-b mags should fit my requirements.
 
Does anybody have any that they'd be willing to part with for the right price? I'm willing to overpay if needed...
 
Thanks in advance.