I'd try Ebay first. I think there are a couple(one even Gray) on there right now. Last I saw it was $24.00. A bargain. I paid $40.00 for mine and it is almost perfect. These appear to be the same, Gen I and Gen II.

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1986 Euro 500SEC "RUF" 9:1CR, "Rose"
1985 Euro 500SEC Cabriolet AMG Widebody
1982 Euro 500SEL "Blue"
2001 Texas Heeler (Aussie/Queensland X) "Sulphie",
2012 Queensland Red Heeler "Squeak"
Best dogs I've ever had.