In a message dated 6/17/2003 11:05:12 PM Mountain Daylight Time,
pchannel@PACBELL.NET writes:

<< ust purchased a 90 Westy. It needs a new auxiliary battery. I would like
to get a deep cycle gel model. I have researched some of the vanagon archives
and they weren't very helpful. It sounds like I need a special battery or have
to modify the case, etc. Is there a battery that will fit, and where can I
purchase one? Do they carry them at Costco? >>

I went through this recently also.  Costco had nothing that would fit without
cutting our metal or off posts.  I purchased a sealed unit from Batteries
Plus. Was told the same unit is used in the Miata.  Fits fine, cost around $70.
They had two different units possible.  Battery made in China.  Same unit was
available from local commercial battery supply house.