Most suppliers just bolt stuff down. NSN Distributors do custom installs in order to fit each individual clients needs. Dont settle for the norm. Check this one out done at Excel Cleaning & Restoration Supplies.

Sapphire 870 with Dual Electric 300′ Electric Solution reels which are live (customer likes to run out the side and sometimes out the back) Dual 200′ electric vac reels (1 for residential and 1 for restaurant contracts so hoses can be dedicated to each) Comet APO which is plumbed under the truck and out the side with custom bracket for discharge hose and manual dump hose. 120gl fresh water tank, custom chem shelf to fit, Vac port plumbed live out the back (look under van on passenger side rear) and a dedicated waste tank wash out line/pressure gun behind waste tank which is live so customer can clean his filters etc.. from driver side. Note that this is not the biggest ford they make so fitting all of this and especially as clean as it was done was a feat in its self. The machine is a beast!.