737 MCP and EFIS switches

Hello folks, I am going to build MCP and EFIS for 737NG. I want panels look as real as it gets, but first problem is, where I could find and buy special switches e.g. for EFIS. For settings BARO and MIN are used some special combinations of rotary encoder and rotary switch. I cant find them. Could someone help me, where could I buy all these things which I need? Thank you in advance.

Short of buying and adapting the real thing, you can't find those. I would love to be contradicted but I've never found them.

I think the only way apart from the real thing is to make them yourself.. For instance take a look at: http://www.hispapanels.com/cabina737...laje/guiai.htm