Sorry a bit late to the game but had mine replaced under warranty a while back and all to familiar with the process.
The correct part number is
EG1Z-19G490-A and truly understand the part is way over the top as pricing goes and couldnt agree with you more.
I emphasize that part number
EA5T-19G490-AA might fit in your case because they surely look identical IMHO considering the circumstances.
I think you may need to get it calibrated with IDS.IIRC. Z
58.88 eahttp://www.ebay.com/itm/172738039814
Here's a pic of my old one,hope it helps any. Z
BEFORE
AFTER