Your problem is that the model number you list is not an 'e' model. It's an older standard model, if I'm not mistaken.
AAM28TRN9KA1AN 450-512 MHz, 1-40 Watts, 1000 Channels
If this is the one that was recently up on eBay, it was mis-listed. I wrote the seller, but never heard back, and never bothered looking if the listing was corrected.
Unfortunately, I only have a VHF and 430-470 bandsplit codeplug for that radio, which I don't belive will work. Will a hex edited one work? Hmmmmm...I don't know.