Hi everyone,
I recently developed a payment gateway for PSiGate, compatible with CS-Cart 2.x
It has been tested and can be seen in action on www.Saje.ca (you’ll need to buy something to see it work tho! 
I have a development environment set up as well I can show you if you’re interested.
DM me for pricing. I can provide you the files, or complete the installation for you.
peace
Steve