The only plastic battery box I have found that will accomodate Trojan T105's is made by
Blue Seas and stocked by West Marine for sailboat applications. Unfortunately it is a
large box with the batteries oriented wide side-to wide side instead of narrow side to
side, making the box deeper than I would've liked for the trailer tongue - almost more
square than rectangular. I also found an outfit in Sacramento CA that makes aluminum
stuff ( http://www.taylorwings.com/ ) and
battery boxes for 18-wheelers and they were more than willing to make up custom-sized
aluminum boxes to your spec for about the same money, compared to the stuff you find in
their web catalog. Summit Racing also sells individual aluminum battery boxes, but none
large enough for a Trojan 6Volt.
I haven't gotten to the point of implementing yet, and I have a spare tire to displace,
but I'm more inclined to have an aluminum battery box made and stay in keeping with the
older Airstream styling than to go plastic.
John Leggett
San Francisco
WBCCI #1154