XSan for 2 workstations without a switch

New to shared storage and fiber channel systems and am curious if you can configure a SAN for just two Mac Pro workstations without a switch?

In other words, without the expense of a switch can I simply hook up two Mac Pro's + FC storage with dual controllers + XSan = happy storage sharing for two?

For example Dulce Systems says with their Pro FC storage:
"The dual ported PRO FC can be deployed in a two workstation configuration without the need of an expensive Fibre Channel Switch. Just apply your favorite SAN management software and you are ready to improve your workflow at the speed of light

Are there any 3rd party external FC chassis that I can throw some drives in and work reliably or am I looking at a dedicated storage sub-system from one of the major players like Dulce, CalDigit, G-Systems, etc.?

Thank you.