Sandiegobrass installed an all electronic cruise control on his Goldwing. Another member did the same but I don't remember who it was, a search on the forum should reveal more information. I installed a Rostra all electronic cruise control on my pick up and would recommend a Rostra 250-1223 cruise or the Audiovox all electronic like the one Sandiegobrass used. The advantage of the electronic cruise is that it's a single unit, about the size of a paperback book, instead of three units you have to install with a vacuum system like the SEI/LTD and 1500s have. Fire off a PM to Sandiegobrass, I'm sure he'll be happy to give you the information and maybe some pictures.
Like David says.. the Rostra would work with the OEM switches... likewise the Audiovox CCS-100 (a vacuum unit) works well in aftermarket motorcycle installations (Its only about $100) and it could use the OEM Switches also
I gotta say I'd rather have the Rostra I installed in my old truck than the factory OEM cruise in my Ford F250. The Rostra was great because of all the adjustability and the variety of inputs it takes. Not to mention the ease of installation and it's compactness. Not the cheapest but one of the best. One other advantage was that it has a strong 17lbs pull which will operate a diesel rack to full throttle which is something a lot of cruise units won't.