Walker makes direct fit mufflers for way-back Hilux and 4Runner, I'd guess they would for Cruisers, too. I put a complete Walker system on my truck last time and it fit alright. I'd do a custom system next time but if all I needed was a muffler it would work.
'91 Toyota Pickup
'09 Kawasaki KLR650
'12 Gunnar Rockhound 29
"To live is to suffer, to survive is to find some meaning in the suffering." -- Friedrich Nietzsche