The only other option there is as far as I know if you don't want nylon or copper is braided stainless steel line. See link below. For the price, I would just step up to an electronic gauge with a sensor.
http://www.summitracing.com/parts/atm-3229
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1450 w/ 44gt deck, 1572 w/ 50C deck, 450 snowblower.
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