Not entirely, StreetScooter was founded in 2010 and was bought by Deutsche Post in 2014.
Then the vehicle has a hight floor making it back friendly for the delivery person which is something unwanted in your average delivery truck. It limits the height of the goods you can transport but the Post does not deliver packages that huge.
This is a special vehicle for a certain purpose and no commerial manufacturer had interest in developing something like this.
Maintenance costs on electric vehicles are a lot less, and obviously they don't use fuel, so that costs less too.
[1] http://voices.washingtonpost.com/federal-eye/2010/06/broken_...
Which leaves 8K to do the customization and would not require the capital investment, on top of that they would have a much higher resale value when no longer needed.
If specs do not require for a 800km autonomy, max speed of 170km/h and no leather seats, no auto-pilot, no high-end stereo system, and so on, then yes ("money" or lack of IT is a big "hurdle".. no?)
Some more background: A few years ago, the Post wanted to slowly transition to electric cars but couldn't find a car manufacturer (IIRC they asked Daimler and BMW) to produce an electric carrier even close to their specification so they basically said "fuck it" and founded their own little startup-like manufacturer