Looking for a custom GPS setup

[SarverSystems]

I am gearing up to equip our local Fire Dept with a GPS in each truck. However, they have a few slightly unusual requirements that prevent me from purchasing a plain-jane dash-top GPS receiver (such as a Tom-Tom).

Requirement:
Must be FAST!!!
Must be able to allow 1,000's of points of interest (mapping the location of each and every fire hydrant)

Like to Haves:
Dash mount (velcro aint gonna cut it)
Touch screen
built-in wifi so the firefighter can start his reports before even getting back to the station
built-in card reader so the firefighter can upload pictures of the fire for the website

I've looked at dozens of laptops (bad choice because of the keyboard and lack of dash-mount possibilities), notebooks (good because the keyboard can be tucked away, but still no dash-mount capabilities, and most run WIndows Tablet which doesnt work with Microsoft Streets and Trips), and sub-notebooks (some are just toooo small, so small that Streets and Trips wont run on them).

I am pretty much out of options other than possibly running a laptop under the seat to an external 15" touchscreen LCD mounted to the dash.

Does anyone have any other options that I am missing?