I don't know if there is no 48 offset available
but on their website
http://www.randdmotorsports.com/buddyclub.html
P.1 Racing SF Wheels Cast Aluminum Wheel
1565 40 4 x 100 $148.03
1770 42 4 x 100 $203.95
1770 42 5 x 100 $203.95
there's not a 48offset