Mazdaspeed strut front tower bar
 

Does anyone know where I can buy one of these used bars in good condition at a not so high price?

You can buy them brand new from Mazmart for under $300. Which still seems to be less than a lot of people are asking for theirs used.

http://shop.mazmart.com/en/2004-2008...trut-tower-bar

Technically a Mazda OE part, google part no. QSEB-56-48Z for the lowest pricing