Here's a suggestion for sales: stock what you "carry."
I lost 90 minutes one day trying to work out which UPS to buy for a client. When I found the stock check option things sped up, but "no stock in the country" or even nonexwithin 100 miles doesn't seem a reasonable position for something listed on your site.
Take items you don't stock out of your website, dammit!
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw