Hi Andy,
If he would go for a replacement part, I would suggest AD8040. It is a quad, rail-to-rail input and output high speed amplifier with an input voltage range of extending 200 mV beyond each supply rail having no phase reversal.
For its + 5 V supply performance see below.
AD8040 can operate on 2.7 to 12 V supplies with a bandwidth of 120 MHz.