Looking for a level translator for single duplex serial bus
The 74HCT125 is fine.  Power it with 5V and it will read your 3V3 Tx and enable signal just fine because \$V_{IH}\$ is only 1.6V (2V worst case).  For the 3V3 Rx use a resistive voltage divider for 'level translation' from the 74HCT125.