You can modify the stock one or by a conversion mount from h&r parts. The mount is probably the easiest way to go. Plus they are only like 90$ or something.
you can also use the 2004r crossmember and a stock 2004r mount ($11.00) ,
just open the mounting holes to the trans a little wider and your done , i would just cut in from ends and then the mounting holes are slotted for adjusting