yellow pages Ben, more o-ring suppliers in Houston than you could call in a week
you can have o-rings any way you spec 'em
molded are better, but 'limit' you to stock sizes (which you can design for)
molds are not expensive, but probably not warranted
spliced joint in 'any' size, just do a bend/peel test on the joint
why be fancy ? use Buna N
ck the chem res charts - no biggie
harder take higher pressure, you don't need that
a fatter section gives you more slop in the tolerances -> 3/16"
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