Are the Ofna 17mm Big Bores currently the largest shocks on the market? (no brand preference)

http://www.amainhobbies.com/product_...ront-Shock-Kit

I've seen quite a few 16mm's, but only those Ofna's in 17mm, and no 18mm. I am basically just looking for over-the-top for a project buggy. They don't have to "be the best" shock on the market. Just the largest/most visually impressive. Like to keep it a bolt on job, not have to make a custom shock tower to fit some bigger 1/5th shocks or something...

Any and all help is much appreciated.

Shawn