Previa/Estima Springs; are they the same?

Need some info by experience.
I was told that Estimas and previas are slightly different.
Will JDM springs fit on USDM Previas?
For the TCR10

And also, anywhere to look for used/new springs, and recommendations for springs/shocks combo?

Air is out of the question by the way.

thanks

Just go on yahoo auction japan and type in "tcr10". Then contact one of our vendors who can order from YAJ. 
 
I personally like the Cusco Vacanza coilovers but if I had the money I would get HKS.
 
Why is air out of the question? Budget or what?

Thanks Mdenoga

Mostly budget.

Do they fit the same?

Yes they will fit right up.  The Previa chassis code is the TCR10.  You don't want to save up and do air?  I highly recommend contacting Robert to bring in the Coil-Overs for you.

Sukoshiyoshi

The Estima also came in 4wd models, and I was told the suspension is different than RWD models.