If you have the skills and desire, I'd cut out the crossmember with the current spring perches and weld in a standard square tube spring hanger.
http://www.datinfab.com/toyotafrontspringhanger.aspx
Or, make your own custom hanger.
http://www.datinfab.com/frontspringhangerpockets.aspx
Problem may be where the body mounts tie in at the core support.
Thanks for the links, I like how they mounted the brackets flush w/ the square tubing. I've contemplated cutting it out and replacing it w/ something similar but my big concern was the body mounts... dunno if I really want to go that far or not. I've never messed with any of that....