🚀 go-pugleaf

(I originally posted this to comp.sys.laptops, where I was politely told to
take this here.  Duh...makes sense...)

I've a friend who has a Zenith Z-181 dual floppy laptop.  This machine is,
technically, obsolete; used units can run as low as $600-700.  A bozoid
at one of his client sites accidentally pumped +26V through the
serial port by plugging a non-RS232 DB25 into the port, and fried the output
drivers.  No big deal, normally...BUT...

Zenith wants $600 to replace the mother board.  (Actually, $580, but who's
counting.)  This is outrageous.  More so, since we cracked the (long-out-of-
warranty) machine open and verified that the output driver chip is sick. (Usual
scope probes.)  The problem?  It appears to be a proprietary chip made for
Zenith by Toshiba--at least, we don't recognize the numbers.  The local Zenith
stores all claim that they can't provide components any more; all repairs and
parts are board-level only.  (This, from the Heathkit folks.  How they forget
the kitbuilders who built them...)

My question, while I pursue ever-higher phone numbers at Zenith, is:

	1) Does anyone recognize this part number, on the chance it's really
	   a stock chip that we don't recognize?  The numbers appear as below:

		Toshiba TC5065BP
			  8714H

	2) If it's either stock or special, can anyone recommend a reliable
	   source?

Replies are appreciated in advance; e-mail appreciated.

	Dave Ihnat
	ignatz@homebru.chi.il.us (preferred)
	ignatz@chinet.chi.il.us	 (works)