@GoBucks!

Apologies. Was working on my '05 T4R this morning and noticed that the leaking line you indicated in your pic is actually the return line from the power steering rack back to reservoir. The two lines mentioned in my previous reply and rdruss are the feed and return lines from the transmission. Size of steel line is 3/8" and you can easily DIY. Online OEM Toyota parts supplier, p/n 4442035201 shows an insane price of CDN$245.00

I'm forgetting you mentioned no shift from your tranny. Like rdruss, I too had to replace the two ( feed & return ) lines from tranny when rust ate thro' one of them. Perhaps its coinsidence but do check the two lines also under the radiator AND the two long steel lines coming directly from the tranny to join up with short lengths of flex lines to the two under the radiator. I lost my tranny 3 years ago( cost me $4200.00 for a complete rebuild) when it ran dry from these rusty line breaks and subsequent leaks.