Here you can find some of the links which might be of interest.
http://www.hispapanels.com/cabina737/indexi.htm -> Page of Manolo, excellent DIY Tuorials
http://www.flying-the-winglets.de/ -> The Page of Ruediger, lots of detailed information about all systems.
http://www.flaps2approach.com -> The page of Iain Williams, this guy has an excellent website covering nearly all topics of using OEM parts in a homecockpit.
http://www.opencockpits.com -> Spain Company which provides hard and software. I bought a lot of stuff from them
http://www.oncealoft.com -> Original Aircraft parts