I have a complete set of gauges with hood deflector listed on ebay, I am parting out two 98GTX's as we speak (half the stuff is gone already and its only been a week) what's nice with this is you can pull the complete harness off and just put the new deflector on. (then you can take apart and sell the tach/speedo off your old set)
untested, but if the info gauge doesn't work i'd accept returns, but I don't want it returned if you find out that your problem wasn't the gauge. (I have two 98gtx mpems's as well, nick is programming them as we speak)
http://www.ebay.com/itm/SEA-DOO-98-..._Watercraft_Parts&hash=item4ad7521145&vxp=mtr