Sorry to be flippant. What I was trying to say was that you will be better off banging your head against a brick wall as these items are very, very rare, and when they do turn up on eBay, go for very large sums of money.
HOWEVER, I was speaking to Andy at AVA Leisure yesterday, and he says he has a full set on his shelf, but they are not advertised on his website (
www.mazdabongo.com) so I can't tell you the price I'm afraid. Give him a ring on 01234-480808.