Ive been doing some research on how to to this for a while now. Ive found someone whos done it (Link here: https://www.google.com/amp/s/www.vankulture.com/single-post/2018/05/14/Spotlight-Kens-2nd-gen-Toyota-Sienna?_amp_) .I think hes on bags but can be too sure. So from what I know you can get 3rd gen coilovers and use 2nd gen top hats to install them. I havent done it yet but i want to, the thing is that we might have to get extended sway bar end links. Ill keep you guys updated and ill leave a link to my other post about this matter.