Mary Burnias gave me this information today:

1) 1 MEG EPROM, 200 NS, 32-pin, 128kx8:

  TOSHIBA:  TC571000D-20/TC571001D-20, 10K QTY. $23.35 each
  HITACHI:  HM27C301-20,	       10K QTY. $19.50 each

2) By comparison:
   
   (2) 27512-200 EPROMs cost  about $13.00  (6.50 each)
   (2) 27512-200 OTPs   cost  about $10.70  (5.35 each)
   (1) 231000-200 ROM   costs about $ 4.15  (plus $3500 mask chrg, 2500 min qty)

3) CONCLUSION: 1 MEG EPROMs are still not cost-effective compared to an 
	       equivalent number of bits in 27512's.

4) Mary is getting more quotes.