Try to imagine his side of the situation. Perhaps he's too busy processing profitable sales (i.e., making money) and doesn't choose to take the time to discuss a transaction that won't add to his profit (i.e., his primary motivation for being in the business).
Do like he (and others here at RFF) suggests... go find someone that offers the specific services you want. That is the win-win situation!
This discussion of develop-and scan-only comes up periodically and reminds me of a conversation I had with a guy at work. His truck needed a major service but he didn't want to pay the shop $600 to do it. He priced out all of the parts/materials and could do it his self for $200. So he did just that... all but one part... changing the transmission fluid. He went back to the shop and asked the owner how much he would charge to change the transmission fluid on his truck. The shop guy reminded him that he needed a complete 100,000 mile service, to which my friend informed the shop guy that he didn't want to pay the price so he did everything himself except that one part for $200. The shop guy quoted him $400 for the transmission fluid change... because he (shop guy) knew how to do it and my buddy didn't... and he (shop guy) can't stay in business if he's weaseled out of what little profit he makes doing the complete service package.
The only other alternative seems to be learning to do it all yourself.
Sorry if I come off as a conservative, Republican American... but making a living by running a small shop is VERY DIFFICULT these days and sometimes small shop owners simply need to get to the point about refusing to do non-profitable jobs... the chances of return visits with "profitable" work is too slim to count on in many cases.
Could you report back in a year or so and let us know if he's still in business or not?