18x10 +18mm and +38mm are not a "standard spec" from Japan.
However, due to popular demand (for the 2011+ WRX and BRZ), we have custom made a batch of them for the US market only.
So right now it is available.
18x10 +18mm or +38mm
+18mm (brembo caliper clearance / no spacers)
+38mm (brembo caliper required 15mm spacers)
For WRX, +38mm will clear ur caliper.
Price at $1980