Thanks so much for all your input. I'm glad I joined this forum. Its nice to have knowledgeable people to fall back on.
I will keep your recommendations in mind. I think with this particular customer though, we'll add one additional bridge, match the parameters as closely as we can to the original working bridges and cross our fingers. The customer wants the least expensive working fix. So replacing a bunch of equipment is out of the question. But in the future for new installs I'll keep your suggestions in mind.