Which country are you in?
I, for one, do think Cherry will give you switch samples, but you should be in a country they heave a branch in. I'd do everything in writing and send them nice letters detailing your situation and asking for a few switch samples of their switches (be sure to give them the model numbers, they're easily confused by stem colour). For your reference (PCB mount, jumper wire, i.e. what they'll most likely have laying around their factory anyway):
Blues: MX1A-E1JW
Browns: MX1A-G1JW
My experience with Cherry so far: I had some questions. I'm just a hobbyist, so I asked them to take their time, as I'm not interested in making large purchases from them, so bothering with me is just catering to a person interested in the technology (i.e. idiot wasting precious support time without buying lots and lots of keyboards). That said, I got what I wanted and then some, but it took a long time. I don't know how fast they are when it comes to doing business, though, and the fact they'll cater to geeks is a large plus for me (although in the end, they were slightly annoyed when I noticed they forgot to give me one datum and when I asked if they had this as well--apparently, giving out force-displacement diagrams of switches not in their switch datasheet (linear, soft, click, alternate action) has to go through R&D). I received the missing datum printed on a sheet of paper by mail, and they even bothered to include (without me asking them to) 10 (read: 17) switches, although they're the most pathetic switches Cherry produce (the dreaded MX1A-D1JW, aka. MX browns spacebar no one likes).
So I'd say the probability of getting Cherry to send out switch samples is at least not zero. Give it a try, but I'd do everything with letters. E-Mails just don't cut it nowadays, they're quickly and easily sent and no one cares about them. Calling them's a bit better if you like to waste other people's time, but letters are at least persistent and can quickly be given to the people responsible, so I'd go for that.
-huha