Looking for a BPROM dealer for these types to convert a board

ifkz

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Looking for a BPROM dealer for these types to convert a board

I have Rolling Thunder PCB that has a good chance at getting converted over to a Hoppin' Mappy through member jrok's guide. I was wondering if there was a good vendor/dealer where I could find all of these parts at once instead of individually:
82S147 or 27s29
82S131 or 27s13
82S191 or 27s191
82S191 or 27s191
82S123

These would need to be unprogrammed (of course).

EDIT: Duh! PM'd a mod asking for a move to general repair/help. My bad.
 
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If it were perfectly good, then certainly not. I would love a Rolling Thunder. The problem is pretty widespread with this boardset (if going by JROK's pages is any indication). Something custom goes flat on the add on PCB and it gets in a boot loop. I found one dead 74lsxxx chip, replaced some screaming resistors, all caps, reseated all chips, and verified all EPROMS.

Better to do something neat with it than write it off as scrap.
 
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