1989 Honda Accord no dipstick

Transmission problem
1989 Honda Accord 4 cyl Front Wheel Drive Automatic 141km miles

my friend and I recently gave my '89 accord a tune up and I was curious about a moaning sound when I take slow turns. He said it could be the belts a little, but it probably wants the power steering fluid. I was curious about that as well. However we noticed that I dont have a dipstick for my transmission fluid port. How important is this? Where can I get another dipstick? Just down at Murrays or Autozone? Honda Dealer? Will just about any dipstick work?