Why not contact the main offices for each brand, and ask them that, if the local dealer REFUSES to stock their arrangers, that would give you permission to show the product in their area and take orders for it yourself?

It seems inconceivable that a dealer be allowed to sit like a dog in a manger on an entire product line, if he is unwilling to stock, show and sell it...

Restrictive trade practices like this are anti-competitive, and borderline criminal, as far as I am concerned. Whatever happened to the 'free market' economy that is supposed to be the backbone of capitalism?