My company is using that old accelerometer. We are upgrading our sensors but we do not want to redesign the whole thing. So we are looking for a newer version of MMA7457LR1, with similar shape and size.
The accelerometers that have the same characteristics as the MMA7457LR1 (resolution, sensibility, communication protocol,etc) are the MMA845xQT and the MMA865xFC, these sensors does not share size or shape with the 7457LR1.