Milo. If you're still looking around for a 1.5" bj spacer, the only place I found when I was searching over the summer is Toytec here in Denver. IDK why but most vendors sell them in 2.5" which is too much IMO. Here's a link:
Vehicle Fitment: 1986-1995 IFS 4Runner and Pickup 4WD
toyteclifts.com
There are independent sellers on ebay that offer 1.5" billet spacers as well. Another link for you below. Unfortunately, Roger aka 4Crawler stopped carrying a lot of the good stuff he had to offer, including his idler arm


Bought my diff drop kit from him back in August. You can always email him, his website is archaic but well detailed, and he still uploads to youtube on DIY stuff every blue moon. His web page on idler arms could be of use to you, as he provides insight into some of the aftermarket options out there. One more link for ya.
For Toyota Hilux LN107 / LN109 / LN111 3L 8L Diesel 1988 - 1997. For Toyota Hilux LN166 / LN171 / LN191 3L 8L Diesel 1997 - 2005. 1.5" 38MM Front Billet Ball Joint Spacer Lift Kit Fit Hilux Surf IFS 4WD 1986-04.
www.ebay.com