Can Anyone tell me what the stock gauge sizes for a Baja outlaw sst 24 ft and where is the best place to purchase a new set with gps speedo thanks

Standard gauges have a 2 1/16" cutout. Monster series gauges are 2 5/8" cutout. The standard speedo and tach are 3 3/8" cutout and the Monster series are 4 5/8" cutout. I'm not sure about your particular Baja, but I have seen them with both. You can either go straight to Livorsi Marine for Livorsi gauges or you can go to CP Performance for Livorsi or several other gauges. CP Performance is probably the best bet.
Eddie

Here is a great place to buy from cheaper in price with the gauges and sending units if you are buying autometer
http://www.egauges.com/vdo_marM.asp