I would take it to an canvas shop. They can measure the existing snaps and dimensions of the boat and make you one. Let us know what it costs. Probably won't be too cheap.
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1985 Wellcraft V-20, Evinrude ETEC 150: SOLD
1979 Marine Trader 44, twin Ford Lehman 120s
2006 Panga 14, Tohatsu 20
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