Ok,
Got some info back from CB and CSP-USA as well as Autocraft.
Autocraft pump - 495 USD, Best system you can get, proper 2 stage pump. You'll need alot of fancy plumbing to make this one work.
CB - 99 USD, Aluminum bodied 30mm pump for T1, needs to be modified to work with a T4, one inlet one outlet, uses stock pickup tube
CSP-USA 169 USD, Aluminum bodied 26mm pump for T4, one inlet one outlet, uses stock pickup tube. Scavenging side is larger than pressure side but not 2:1.
I'm placing my order for the CSP pump and DS tank right now
Hope to have it by the end of the month.
Sandeep