I've been requested to set up a group buy.
SST-27SF512
Spec is as follow
Series 27SF 512 K-bit (64 K x 8)
Eraseable EPROM
32 Pin PLCC
70 NS 5 V
Price is around $2.5 each shipped within US. Shipping to Canada is available. Final cost would be depends on the total number of chips ordered.
No chip limit on purchase, and you will get the number of chips you ordered.
Send me a PM if you're interested. Thanks.