The buttons (and sometimes the thrust washer and weights) are considered maintenance items that will eventually need to be replaced.
and your worn buttons is where your getting the "clacking noise" from.
The button kit, and the thrust washer are the same part numbers as 92+ clutches,
But the weights have a different part number... (and I'm not sure if that part # is obsolete or not)
Refer to Springbok's exploded view above...
#12 - Button kit -
#1014453
https://www.cartpartsplus.com/golf-c...tch-button-kit
#8 - Thrust Washer -
#1014058
https://www.cartpartsplus.com/golf-c...-thrust-washer
#15/Detail A - 89 to 91 Drive clutch weight kit -
#1014455
(92+ is #1016801)
It's not listed on Cart Parts Plus website, but, a lot their inventory isn't,
I'd suggest calling them on the phone, and ask about it!
Your buttons defiantly need to be replaced! and weight tips look pretty worn also,
I personally would replace all of the parts that I listed,
it's cheaper than replacing the clutch, or having to open it back up in 3 to 5 years.