1747-M11 Write Protected

Hi

Any one know of a quick method of making this eeprom reusable again, i have one thats been write protected?

Looking at AB's website i can send it back to them for $175 or if i get a 1747-M15 i can plug into a PROM burner to erase the chip.

I dont have an M15 or Prom burner (used a Prom burner at college a few times but that was years ago!).

I've seen M11s on ebay, for much less than $175.