I don't believe that Mazda any longer makes them (hatch springs). They are sold out everywhere and there isn't a new batch date yet. That is the info I have gathered up until last week.
I also have been looking.
*Edit* This was directed towards the Hatch springs. Sorry i didn't clarify that. Umm the sedan springs are still made and for sale.
Sports springs 2.3L & 3.0L (sedan)
I know there are other sites that i'm forgetting but here is a quick search I just did. These probably do not include shipping.
Finishlineperformance.com has them for $249.95
trademotion.com has them for $225.00
lbpartscenter.com has them for $240.00
ocmazdaspeed.com has them for $234.00
grounddynamics.com has them for $300.00
Ahh sorry about the bad news.
I felt the same b/c I too was looking. If your order goes through and is filled, please let us know as soon as possible as I know a few of us are looking for these springs.
Thank you and good luck