Are there dual port PCIe x1 gigabit NICs available?

Are there dual port PCIe x1 gigabit NICs available?

I only know of ones that require a x4 slot, but if PCIe v2 doubles the bandwidth per lane, and PCIe v3 quadruples it, there ought to be dual port PCIe v2/3 NICs that only require a x1 slot, surely?

I've only got one x1 PCIe v2 slot available on a machine which ideally needs another two network ports.

To add to the complication, it needs to be compatible with VMware ESXi, so an Intel chipset is desirable.