good luck... it sounds a lot easier than it is! it is no doubt a beautiful solution but one that comes with a price. If you find a way to do it sans cold roll laminator ($$$) please let me know, i've been looking for some time to try to figure it out. There's no work pending right now that needs it, but i'm always looking.
I don't know how many places there are out thataway that could do it. But if you decide you have to send it out, Fine Art Solutions in los angeles is THE place!!!!! they've been doing this for years and mount most notable contemporary photographer's work from all over the world. [the last time i was there, they were working on a bunch of absolutely beautiful richard misrach prints.
keep us informed...
... oh, and diasec from what i gathered is a trademarked name for a process that is used more in europe and those that know how to do it, aren't saying jack which kind of makes me think that if one can get their hands on the right materials, it may not be so difficult to do.