ESXi to Dell Optiplex 7010 - no network card

I am trying to install ESXi 5.1 onto a Dell Optiplex 7010 but getting the no network card found error

The only instructions I can seem to find date back a few years

Install ESXi 5.1 to DELL Optiplex 7010

However the link to the VIB is dead and I have looked all over but cannot find it.

Can anyone advise how I can install ESXi 5.1 onto a Dell Optiplex 7010 PC

This is for lab purposes

Thanks