FTDK - and I believe Hallet's still going strong with a range of (including vintage) ag aircraft. CS had a stint at tourist flying in his rebuild project (with WB at one stage I believe?!), but has since "faded from radar cover".
But the best ag ride I got was in a DC3 out of WO (or GS) in the early 80's (I think - grey matter failing me now!!!)....GT's father. Need anymore 2 letter acronyms??