you and most dealers never know if parts are available until you get a specific part number and run it through KUBOTA'S system (dealer's system doesn't specify)
most of the time kubota will just let stock deplete and won't replenish, so when they check warehouse stock, it'll just show a bunch of zeros in the columns, stating how many are available
after zero stock is in there for a few years it'll just say invalid number or discontinued
kubota does not sell ANY parts for the kawasaki engine and if you go to get an air filter or a crankshaft for a kawasaki engine, even though the parts books might have a part number, you ain't getting it from kubota--it's gotta come from kawasaki. Occasionally a kawi part will have a kubota part number and when you go to check kubota stock, it'll say "discontinued". Just get it from kawasaki.
there's a t1460 and a t1460A and there are minor differences, give dealer your serial number
when you need deck parts you have to look them up for the deck model number, e.g. RCK40LT, etc.