What are the stock speakers that come in the 1989 TII?
ie) size and brand

 

brand is usually clairon or pioneer, or cheapo off shore. Either way they were custom made for the car and you won't find direct plug in replacements.

However they are standard sized, 150mm in the doors and rear (a true 6") and 4" in front dash. Some 6 1/2" speakers will fit in the 150mm locations.