Bringing up an old thread again, I am the new owner of a UZJ100 and looking to replace the T connectors. I found this in our local online parts shop, they are aluminium so that would be better than brass, cheaper than stainless and more durable than OEM right?
www.sparesbox.com.au

Aeroflow Aluminium T Piece 15.8mm 5/8" Black Tee Piece | Sparesbox
Shop For Aeroflow Aluminium T Piece 15.8mm 5/8" Black Tee Piece at Sparesbox Australia. $9.90 flat shipping Australia wide on all orders.