Dear MnScuba
I am a SAR diver for my local dive team. Though we do not get called out much, we train for every situation. We used to used the neoprene drysuits for a while, but after a couple of marina searches, the suit was trashed. Go for the vulcanized rubber suit. Our team got a great deal though one company. We are now an authorized dealer, so we can buy more gear.
I personally dive with the TLS 350, but if I am going to do a team dive, I will deffiantly use the vulcanized rubber suit. I do not know if your team is OSHA approved for hazmat, but to do hazmat, you have to have a hard hat/ full face mask.
If you do get the rubber, which I highly reccomend, then get some kevlar knee pads or some other type. Aslo in my opinion, I would stick away from the dry gloves while doing team dives. If you do evidence recovery, you will be digging alot. I am on my third pair of gloves. The dry gloves would be expensive to replace every time.