rear heating, repurposing of old bits..?

1.  Has anyone got any information or links to images to vans with a 'repurposed' falcon/econo front heater box into the BACK of a van for the passengers?  Old Air Products makes one thats basically the same thing, just not as cool...

http://www.oldairproducts.com/catalog/heaters/ip-165h-series-heaters-c-30000000_32000000_32300000_32302000.html

2. (I've never seen the insides of one, so don't judge this question) Has anyone ever looked into adding an evaporator to the stock falcon/econo front box to make it dual purpose?  I am wondering if it could be done?  Maybe Old Air could consult...?

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If I were to go all out and use their kits, I like this one up front..

http://www.oldairproducts.com/catalog/universal-hurricane-systems-electronic/old-air-products/cap-2100/hurricane-2100-complete-system-p-4298.html

And this one hidden in our travel wagon cabinet, along with the above heater...  

http://www.oldairproducts.com/catalog/hurricane-trunk-units/ip-2005t/ac-system-p-4465.html

nice stuff...but real steep in price. If you want a small box w/ a fan, try looking at heaters fro mid to late 30's and 40's cars. Simple bulkhead mount heaters with slow working powerful fans.

I got a 30 Chevy bulkhead heater thats 6" across x 10" tall x 4" thick....I may mount in the rear corner with an Aux switch on the dash.